Tennis is one of the most popular sports in the world, with hundreds of tournaments played in the calendar year. Chief amongst them are the four Grand Slams i.e. Australian Open, Wimbledon, French Open, and US Open.
But, there are other important ATP tournaments like the ATP Masters 1000, ATP Masters 500 and ATP Masters 250. These tournaments are important in terms of ranking points as well as adding a huge amount of money to a player's overall career earning.
Recently, Roger Federer won his 100th ATP title in Dubai by beating Stefanos Tsitsipas, becoming only the second player to achieve that milestone since the Open Era started in 1968, where professionals were allowed to compete with amateurs.
#5 John McEnroe - 77
John McEnroe is an American retired tennis player who is considered one of the best players to have ever played the sport. He started playing at the age of eight and in 1978 joined the ATP Tour. McEnroe played both singles and doubles tournaments and won 77 singles titles and 78 doubles titles during his career. He also has seven Grand Slam singles titles to his name (four US Opens and three Wimbledon Championships.
The American International also won the ATP Player of the Year in 1981, 1983 and 1984. In 1994 he decided to play only doubles tournament and retired from singles tournaments. However, in 2006 he completely left the court by taking retirement from doubles as well. Currently, he works as a commentator in major tournaments.
#4 Rafael Nadal - 80
Rafael Nadal is known as the king of clay, as he has won 11 French Open titles, the most by any player. The 32-year old Spaniard has also won 80 ATP singles titles and 17 Grand Slam singles titles.
Nadal is the seventh player in the Open Era to achieve a career Grand Slam (winning all four Grand Slams). And he is the second male player, after Andre Agassi to won a career gold Grand Slam (the four Grand Slams plus the Olympic gold).
He currently ranked number two in the male singles world rankings. He turned professional when he was 15 and won his first Grand Slam in 2005, the French Open, at his first attempt.
#3 Ivan Lendl - 94
Ivan Lendl is a retired Czech and American tennis player. He won the boys' singles title at the French Open and Wimbledon in 1978 and was ranked number one junior player. He turned professional in 1978 and has won 94 singles titles and six doubles titles during his career. He has also won eight Grand Slams which consists of three French Opens, two US Opens and two Australian Opens.
He retired in 1994 and in 2001 he was inducted into the International Tennis Hall of Fame. In 2018 he joined Alexander Zverev's team as a coach.
#2 Roger Federer - 100
Roger Federer is currently ranked world number seven by the ATP and is the 2nd player in the Open Era to win 100 ATP singles titles. He won his 100th title by beating Stefanos Tsitsipas at the Dubai Duty Free Tennis Championship.
He also has 20 Grand Slams to his name, the most by any male player. He won has six Australian Open, eight Wimbledons, five US Opens and one French Open. Federer also holds the record of being ranked number one in the world by ATP for 310 weeks, which includes consecutively for 237 weeks.
#1 Jimmy Connors - 109
Jimmy Scoot Connors is considered one of the finest players in the history of the sport. He started playing tennis at a very young age and turned professional in 1972. The American international won eight Grand Slam singles titles during his career, alongside won five US Opens, two Wimbledons and one Australian Open.
Connors has won 109 singles career titles, highest by any male player in an Open Era. He also holds the record of most singles matches played (1,535) and most number of wins (1,256).
He was ranked number one in the world in 1974 and remained at the top spot for 160 weeks consecutively till 1977. He won the ATP Player of the Year in 1982 and also won ATP Comeback Player of the Year in 1991.
He retired at the age of 43 in April, 1996 and in 1998 he was inducted into the International Tennis Hall of Fame.