LONDON — Britain’s Harriet Dart was left frustrated after she was dumped by her Wimbledon mixed doubles partner Jay Clarke for American teenager Cori Gauff.

The 15-year-old Gauff has captivated Wimbledon after becoming the youngest player in the professional era to qualify for the main draw before beating Venus Williams and 2017 semi-finalist Magdalena Rybarikova to reach the third round.

Dart received a text from Clarke, saying he was switching partners ahead of the mixed doubles opening round on Thursday.

“Essentially due to the timing I wasn’t able to find another partner in the time period available,” Dart, who plays singles on Thursday against Brazilian Beatriz Haddad Maia, told the Daily Mail

“I did ask a number of people but a lot of them were set up and that’s it. I think you should ask Jay about his reasons, that’s all I want to say.”

Clarke said Gauff, known as Coco, had contacted him and asked him if he could partner her.

“I’ve known Cori for a few years now, we got in contact and she asked me to play,” the Briton said. “That was tough, I had to let her know because I saw the pairs that had signed in, and I was (thinking) ‘am I even going to get in?’”

“I think it’s the worst decision I have had to make especially mid tournament. I didn’t sleep too well the night before I played Noah (Rubin in a first-round singles match) but hopefully she understands why I did it. I’m sorry for her it happened.”

Clarke lost to Roger Federer in a second-round singles match later on Thursday, after which he said he and Gauff had the same management company and had been to concerts together.

“She’s with a management group. I’m with the same management group. Yeah, her agent spoke to my agent. We went to a few concerts last year with the company,” he said.

“Yeah, so she’s a really, really cool kid. She’s got a really bright future.”

Consolation for Dart, 22, was that she reached the third round of the singles with a 7-6(4) 3-6 6-1 win over Brazilian Beatriz Haddad Maia to set up a clash with world number one Ash Barty.

Asked about the switch after her victory, she told reporters: “I think that’s in the past. Yeah, I think just got to look forward. I’m just concentrating on my singles.”

Clarke and Gauff will face Robert Lindstedt and Jelena Ostapenko in the mixed doubles first round.