Steffi Graf in a tight third set that included a 16-minute long, 13-deuce game on Sanchez Vicario's serve at 5-5. In August Monica Seles made her much anticipated return to tennis at the Canadian Open. It was decided to grant her a joint number one ranking with Graf who took her first loss of the year in the first round to Amanda Coetzer. The US Open was Monica Seles's first Grand Slam event since the 1993 attack, with much anticipation again around a potential Seles-Graf final. After surviving a scare in a three-setter against Amanda Coetzer in the first round, Graf reached
Steffi Graf San Diego, Graf reached the US Open final, where she lost in straight sets to Sabatini. Graf won four indoor tournaments after the US Open, including a pair of straight set wins over Sabatini in the finals of Zürich and Worcester. Although Sabatini got the best of Graf in the semifinals of the season-ending Virginia Slims Championships, Graf still finished the year as the top-ranked player. A mixture of injury problems, personal difficulties, and loss of form made 1991 a tough year for Graf. Seles established herself as the new dominant player on the women's tour, winning the Australian Open,