In 1988, Steffi Graf won the Women's Singles.
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The players who won the 1988 Tennis Grand Slam were Mats Wilander for the U.S. Open, he also won the French Open and the Australian Open. For the Wimbledon Stefan Edberg won.
It's Steffi Graf - she has won 22 Grand Slam singles titles, including the Golden Slam (all four Grand Slams in a year + the Olympic Gold Medal in singles, in 1988). Martina Navaratilova has won the most number of doubles Grand Slam titles. She is also the leading winner of overall Grand Slam titles.
Andre agassi won eight time won grand slam titles
Greg Rusedski has never won a Grand Slam Event.
He has won 1 Grand Slam: Australian open 2008
Yes he has won at least one time each grand slam title
He won the Australian Grand Slam twice in 2008 & 2011.
He has won 14 grand slams.
He has been awarded 16 Grand Slam Titles.
Stefi Graf
Currently no Golfer has one the Grand Slam. Although Tiger Woods has won the Tiger Slam all 4 majors in a row, and others have won the career Grand Slam, such as Jack Nicklaus and Gary Player.
In 2003 Roger Federer won his first Grand Slam at Wimbledon at the age of 22.