A. Steffi Graf
B. Serena Williams
C. Roger Federer
D. Rafael Nadal
Answer: Steffi Graf
Who is the only tennis player to have won a Golden Slam (all four Grand Slam titles and an Olympic gold medal in the same year)?
Additional Information: Steffi Graf won the Golden Slam in 1988, claiming all four Grand Slam titles and the Olympic gold.
Subjects: Sports, General Knowledge