Andre Agassi, Pete Sampras, Jimmy Connors and John McEnroe all have records unlikely to be broken

Records are special in any sport and every player who is looking to get to the very top is eager to break them. But some records are almost impossible to break. We are bringing you five such records from the world of men's tennis.

First in the list features John McEnroe’s best win-loss record in a calendar year. In the year 1984, the now 65-year-old registered 82 wins and suffered just three defeats with a win % of 96.47. Serbia’s Novak Djokovic came a bit close in 2015 when he won 82 matches and suffered just six defeats with a win % of 93.18.

Former world number one Jimmy Connors holds the record for the most ATP titles in the singles category. He has won 109 ATP titles in the singles category. Switzerland’s legendary tennis star Roger Federer remains the closest with 103 titles to his name. Djokovic is the closest with 98 titles to his name out of all the current players.

America’s legendary tennis star Pete Sampras holds the record to finish the world number one for six consecutive years from 1993-1998. Djokovic holds the record for most world number-one finishes at the end of the year (eight times) but he has not managed to finish at the top of the ladder consecutively for such a long period of time.

America’s Andre Agassi holds a unique record career Super Slam. The 53-year-old is the only player in the history of men’s singles tennis to win all four Grand Slams, the ATP Finals, an Olympic gold medal and the Davis Cup. As things stand, Djokovic can join him if he manages to win the Olympic gold medal this season.