Tennis players in the men's and women's game compete each year for four Grand Slam events. Their careers are usually defined by how many they have won when they retire from the sport.

The Australian Open, French Open, Wimbledon and US Open make up the Grand Slam tournaments and take place on varying surfaces.
In the history of men's tennis, Roger Federer holds the record for the most Grand Slam singles titles. He has won 17, including four Australian Opens, one French Open title, seven Wimbledon titles and five US Open crowns.
The Swiss is regarded as one of the greatest players of all time. From 2004 to 2008 he held the number one spot in the world rankings for 237 consecutive weeks.
Federer is also one of four men in the Open Era to complete the career Grand Slam by winning each of the four events at least once.
In second place in the standings for the most Grand Slam singles titles is Pete Sampras.
The American ended his career with 14 major tournament wins. He was most successful at Wimbledon on his favourite surface of grass. Like Federer, Sampras won the championship in London on seven occasions. He is still the last man from America to win the tournament.
The only Grand Slam Sampras was unable to win in his illustrious career was the French Open. He did not enjoy playing on the clay in Paris.
Two wins in the Australian Open came for the former world number one, while he won his home slam at Flushing Meadows on five occasions.
In the women's game, Margaret Court was successful 24 times in Grand Slam Singles from 1960 through to 1973.
The Australian completed the career Grand-Slam with 11 Australian Opens, five French Open wins, three Wimbledon titles and she also won the US Open five times. She was the first woman of the Open Era to win all four tournaments at least once.
Court not only had plenty of success in the singles game but she also won 19 Grand Slam doubles events and 21 mixed doubles titles.
Steffi Graf finished just two off Court when she finished her career. The German was most successful at Wimbledon with seven wins, while she was also equally as effective on clay at Roland Garros where she won the major six times.
The former world number one women's player is the only person in history to achieve the Calendar Year Golden Slam as she won all four tournaments in 1988.
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