BBC has reported that in the first round of the French Open the seven-time Grand Slam champion, Venus Williams lost to world number 91 Wang Qiang.
Ninth seed Williams, the runner-up at Roland Garros in 2002, was beaten 6-4 7-5 by the 26-year-old Chinese player.
Williams, 37, who is set to compete in the doubles with sister Serena in Paris, went out when she sent a forehand into the net.
Meanwhile, fourth seed Elina Svitolina beat Ajla Tomljanovic 7-5 6-3.
Johanna Konta was the first-round accident, going down in straight sets against world number 93 Yulia Putintseva, who won 6-4 6-3 in an hour and 24 minutes.
Sloane Stephens won the US Open last year, breezed into the second round after beating Arantxa Rus of the Netherlands 6-2 6-0.