Claim: Steffi Graf competed in multiple professional tennis competitions like the Australian Open, the US Open, and French Open.
Evidence: In 1988 , she became the first and only tennis player -LRB- male or female -RRB- to achieve the Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year.
The Grand Slam itinerary consists of the Australian Open in mid January , the French Open in May and June , Wimbledon in June and July , and the US Open in August and September.