Former world number one Serena Williams, who was playing her first match since losing in the Wimbledon final, was sent crashing out of the WTA San Jose tournament in straight sets on Tuesday.
The 23-time Grand Slam winner struggled mightily against the British No. 1 and former winner Johanna Konta who needed just 51 minutes to crush Williams, 6-1, 6-0 in their opening round match.
Williams, who was seeded sixth, managed just nine winners against 25 unforced errors and had her serve broken six times.
Both women were playing their first match since Wimbledon, where Williams finished runner-up to Angelique Kerber and Konta lost in the second round to eventual quarter-finalist Dominika Cibulkova.
Konta won her maiden WTA title at this event in 2016 when it was held in Stanford University, defeating Serena's older sister Venus in the final.
Konta next faces Sofia Kenin, who earned a dominating win over qualifier Veronica Cepede Royg on Monday.