Venus Williams won her biggest title in more than five years after winning the Dongfeng Motor Wuhan Open.
The seven-time grand slam winner faced Wimbledon runner-up Garbine Muguruza in Saturday's final, but with the American leading with the score on 6-3, 3-0, her Spanish rival retired with an injury.
The former world number one's previous victory at a Premier Five-level event took place at the Dubai Duty Free Tennis Championships, in February 2010.
The early exchanges were fairly even, with the unseeded American and the sixth-seed from Spain trading four breaks of serve in the first seven games.
Williams emerged in front with the 4-3 lead in the opener, but at that point injured Muguruza's level dropped considerably.
Whilst the 35-year-old Williams played better and better, Muguruza offered little resistance as the veteran American won the next five games without breaking a sweat.
"Well, this is a sad day today," Muguruza said during the post-match interviews.
"I'm very sorry I had to retire today, but I had a really amazing week here in Wuhan. I felt so much support from the crowd – it was great.
"Also, I really want to congratulate Venus. She's always such a tough player and she had an amazing week, as well. For sure we'll play again soon, and it's going to be a tough match, of course."
Williams was particularly complimentary of her opponent after the match, hinting that the result might have been different if the 21-year-old had been fully fit.
"Congratulations Garbine for making the final," Williams said. "I know you had a tough match yesterday – it's not easy when you don't play your best, and I probably didn't have a chance if you felt well!
"I want to thank you all so much. It's such a wonderful moment to play in the new stadium here."
The result moves Williams up from 24th to 14th on the world rankings, while Muguruza will reach a career high of fifth when the new WTA rankings are formally released on Monday.