It's tough to judge how Rod Laver might have performed against today's players, but we believe the red headed Australian would have fared well. It is difficult to disagree with the "Rockets" record. He was world number one for seven consecutive years (1964–1970), and he claimed more professional championships (200) than any other player in the game's history.

Rod Laver is the only tennis player in history to have earned the Grand Slam twice, first as a novice in 1962 and then as a professional in 1969. Who knew how many Grand Slam titles Laver might have won had he not been barred from the Grand Prix events for a five-year stretch in the mid-1960s. During this era, known as the pre-open era, Grand Slam competitions were exclusively for amateurs. Tennis's "open era" began in 1968, as professionals were officially permitted to play in Grand Slam competitions. Given Laver's world number one ranking throughout this five-year span, it is possible he might have won several more Grand Slam championships.

Date of birth: 8 August, 1938

Career Titles: 200

Prize Money: ~1.5M

John McEnroe was among the top players of the 1980s, perhaps most remembered for his "You cannot be serious!" Wimbledon breakdown and other on-court theatrics.He made his professional tennis debut in 1977 as an 18-year-old amateur, earning his first Grand Slam championship in the French Open Mixed Doubles and breaking the record for the greatest Grand Slam performance by a qualifier with an astonishing run to the Wimbledon Semifinals. In 1978, he led the Stanford University to CAA championship and claimed the NCAA singles match, before going pro and capturing another five championships the following year.

The player proceeded to sweep a record of 77 singles and 78 doubles trophies, including seven Grand Slam singles victories (4 at the US Open and three at Wimbledon), ten Grand Slam teams titles, and five Davis Cup titles with the United States. He is one of only three members in the Open Era who held the world no. 1 position both in singles and doubles (the other two being Stefan Edberg and Stan Smith). Also, John McEnroe owns the record for the greatest game record in a season, winning 96.5 percent of his games (82 wins, 3 losses) in 1984.

McEnroe also authored his autobiography in 2003, appropriately named "Serious," which became a big seller.

Date of birth: 16 February, 1959

Career Titles: 155

Prize Money: ~$12.5M

During the mid-1970s, no one ruled tennis more than Jimmy Connors. Connors had a stunning 99-4 record in 1974, winning all three Grand Slam events he contested. He also became just the second tennis player in Open Era history to earn three Grand Slams just in one single year, despite being refused admittance to the French Open owing to his affiliation with World League Tennis. He proceeded to win 8 Grand Slam singles championships (five at the US Open, two at Wimbledon, and one at the Australian Open), as well as two Grand Slam doubles wins.

Connors still retains the ATP Open Era records for most total matches (1557), most championships (109), and most matches wins (1274) in 1974. Additionally, the guy maintained the world no. 1 position for 160 consecutive weeks between 1974 and 1977, and led the ATP rankings for a combined 268 weeks during his 24-year career.

In 1974, Jimmy Connors was barred from the French Open owing to his connection with World League Tennis, preventing him from completing a probable Grand Slam sweep. Despite his 1970s peak, Connors retired in 1996 after a lengthy and excellent tennis career.

Date of birth: 2 September, 1952

Career Titles: 147

Prize Money: ~$8.6M

Ivan Lendl, who was a junior world number one before going pro in 1978, also played a prominent part in courts in the 1980s. The calm and stern Czech with the powerful serve was the era's most dominating player. Lendl wore out his rivals with his ferocious topsin forehand, ground strokes, and unmatched fitness. Unlike most of his more talkative contemporaries, Lendl was renowned for letting his performance speak for him.

For four years, he was the world's top-ranked player, and he maintained the top spot for 271 weeks, a record at the time. Over the course of his 22-year career, he won an incredible 94 singles championships, counting 8 Grand Slam titles (3 US Open, 3 French Open, and 2 Australian Open), which places him third all-time during the Open Era (only behind Roger Federer and Jimmy Connors and Roger Federer). Ivan Lendl has been the only male tennis player to have won over 90% of his matches in five consecutive years.

Since retirement, he has found success as a coach, having assisted Andy Murray in winning three Grand Slam championships, including Wimbledon in 2013.

Date of birth: 7 March, 1960

Career Titles: 144

Prize Money: ~21.2M

Roger Federer, perhaps the greatest tennis player in history, has accomplished everything. In a career that spanned forty years, the Swiss has spent a total of 310 weeks atop the world rankings and has the Open Era's greatest winning run, having dominated the ATP charts for a four-and-a-half year stretch (236 weeks) from 2004 to 2008. Between 2005 and 2010, his domination in the 2000s witnessed him reach 19 of 20 major finals. In 2004, 2006, and 2007, he won three of the four Grand Slam championships, finally concluding his Professional Golden Slam in 2009 with the French Open victory.

He has won an incredible 103 singles championships, second only to Jimmy Connors in the Open Era, including a remarkable 20 Grand Slam titles (with Novak Djokovic and Rafael Nadal and) and a remarkable six ATP World Finals wins.

In 2017, he won at least eight Wimbledon championships and is tied with Jimmy Connors and Pete Sampras for the most U.S. Open titles (5).

Federer is also a crowd favorite, winning the ATP Fan's Player of the Year title 18 consecutive years from 2003 to 2020, as well as the Laureus World Athlete of the Year award five times. Roger Federer unquestionably deserves his spot in history as being one of the best players of all time.

Date of birth: 8 August, 1981

Career Titles: 103

Prize Money: ~$130,5M

What was there not to like in the long-haired, blond Swede with the lethal ground game? With cold water coursing through his veins, Bjorn Borg conquered tennis in the late 1970s, winning famous matches against Jimmy Connors and John McEnroe. Borg dominated Wimbledon from 1976 through 1980, winning the trophy five straight years.

Bjorn Borg's pro tennis career began at the age of 14 when he represented Sweden in the Champions Trophy in 1972. He won his maiden Grand Slam championship two weeks after turning 18 in 1974, becoming the youngest male French Open winner at the time. The Swede would go on to create some of tennis' greatest rivalries, challenging John McEnroe and Jimmy Connors for supremacy in the late 1970s. Regrettably, he was forced to withdraw from playing tennis at twenty - five due to the continual strain.

Borg spent a combined 109 weeks as world number one throughout his brief career and earned 11 Grand Slam championships (5 Wimbledon and 6 French Open). He won four straight French Open championships and 5 successive Wimbledon crowns as a result of his domination on grassland and clay courts (along with his colleague Roger Federer).

Date of birth: 6 June, 1956

Career Titles: 101

Prize Money: ~3.6M

Rafael Nadal, one of the most accomplished youngsters in ATP tournament history, achieved the world number two rating at the age of 19 after winning 16 tournaments, including his very first French Open triumph in 2005.

By 2008, Nadal had secured a fourth French Open victory and his first Wimbledon triumph when he vanquished Roger Federer in a few of the finest tennis matchups of all time. He became world number one for the very first time that year and also won an Olympic medal in the 2008 Olympic Games.

Rafael Nadal has earned a total of 88 championships since then, including 20 Grand Slams, a record he shares with Roger Federe and Novak Djokovic. With a lifetime winning percentage of 91.5 percent on clay and a record of 105-3 in Roland Garros, the Spanish player won the prestigious 13th French Open championship in 2020, establishing him as the uncontested King of Clay.

Date of birth: 3 June, 1986

Career Titles: 90

Prize Money: ~$127.1M

Novak Djokovic has shattered nearly every record in tennis history. Djokovic, now ranked No. 1. in the ATP ratings, has maintained the top place for a record 335 weeks. The famous player has won a number of 85 singles victories over his eighteen years on the pro circuit, including a record-tying 20 Grand Slam titles, and seems to be the most likely of the "Big Three" to earn another major title. He has won the prestigious nine Australian Opens, six Wimbledons, three US Opens, and two French Opens.

Djokovic is the first and only player to have won all nine Masters 1000 championships at least once and owns the record for the most Masters titles won with 36. In 2015–2016, he claimed the non-calendar Major Championship and simultaneously held all four Slams. In 2020, he defeated Rafael Nadal to win his second French Championships, becoming the first person in the Open Era to accomplish the Career Grand Slam two times.

Novak Djokovic, who is currently playing some of the greatest tennis of his lifetime and shows no signs of slowing down, seems to be the most likely candidate to break all Grand Slam championships records.

For years, Novak Djokovic made it evident that this was his ambition. What motivated him. What influenced him. Djokovic's major goal was to win the biggest trophies on the largest platforms in his sport, and today he stands alone -ahead of Rafael Nadal, Roger Federer, and every guy who has ever swung a racket.

Djokovic won his 23rd Grand Slam singles title, breaking a tie with Nadal and moving three points ahead of the retired Federer, with a 7-6 (1), 6-3, 7-5 victory over Ruud that was never in doubt for the majority of the 3 hours, 13 minutes.

Date of birth: 22 May, 1987

Career Titles: 86

Prize Money: ~$154.7M

Pete Sampras' position in tennis history is debatable, considering he won just three out of the four Grand Slam tournaments throughout his career. While they are clearly more at ease on clay courts and grasses, how can we determine a player's standing when they excel on one surface but struggle on another? When Pete resigned in 2002, the man was widely regarded as among the greatest tennis players of all time, but this is debatable.

For six straight years, he was ranked among the top one in the world, and his fourteen Grand Slam wins were a world record. Who can overlook his spectacular fights with Andre Agassi, which helped transform the 1990s into a golden era for tennis? Pete ended his career on a high note by winning the 2002 US Championships, his final Grand Slam competition.

However, with no French Open championship, or even finals, how can we determine his place among the all-time greats? For the time being, we believe Pete Sampras ranks ninth.

Date of birth: 12 August, 1971

Career Titles: 64

Prize Money: ~$43.2M

Andre Agassi was a standout tennis player during what is called the golden period of American tennis in the 1990s. He won an astonishing 60 singles victories throughout a two-decade career, including 8 Grand Slam championships (2 US Open, 4 Australian Open, 1 Wimbledon and 1 French Open). Agassi is really the only male tennis player to have won a Grand Slam title on all major competition grounds and is the only player to have achieved the Lifetime Super Slam by sweeping all 4 Grand Slams, year-end championships, and a Gold Medal for Olympic.

Following his retirement, Andre Agassi wrote his autobiography "Open: An Autobiography", which debuted at number one on the New York Times List of Bestsellers and is widely regarded as one of the greatest tennis novels ever written.

Agassi has also established himself as a champion off the court. Agassi and his spouse, tennis superstar Steffi Graf, may be the only athletes who give back more to their community than anybody else.

Date of birth: 29 April, 1970

Career Titles: 61

Prize Money: ~$31.1M