San Diego Open: British wildcard Katie Boulter produced the biggest upset of the Queen's Club Championships on Friday, defeating top seed Elena Rybakina 7-5, 2-6, 7-5 to book her place in the semi-finals after a demanding day that also included a second-round victory over Jaqueline Cristian.
The world No. 73 secured her maiden win over Rybakina, having lost to the Kazakh in straight sets in their previous meetings at the 2023 Wimbledon and 2025 Indian Wells, and sending Boulter into her second semi-final of the 2026 season following her title win in Ostrava.
"I think my goal today was just to play better than I did the last time at Wimbledon," Boulter stated. "I felt like I really let the occasion get to me that time and I wanted to prove to myself and to others that I'm a better tennis player than that."