Patty Schnyder (born 14 December 1978 in Basel) is a retired Swiss professional tennis player. She played on the WTA tour from 1993 to 2011 and is a former world no. 7. She defeated twice a reigning world no. 1 player in her career: Martina Hingis at the 1998 Grand Slam Cup and Jennifer Capriati at the 2002 Family Circle Cup. In addition she defeated players who were no. 1 at some other time, including Lindsay Davenport, Serena Williams, Arantxa Sánchez Vicario, Steffi Graf, Kim Clijsters, Justine Henin, Amélie Mauresmo, Jelena Janković, Ana Ivanovic, Caroline Wozniacki and Maria Sharapova.
During her long career, she reached six Grand Slam singles quarterfinals and one Grand Slam singles semifinal. She won 11 WTA singles titles and 5 WTA doubles titles and earned over US$8.4 million in prize money.