Ajla Tomljanovic has been left frustrated at missing out on a quarter-final place at the Birmingham Classic WTA tournament as she was derailed by a stomach complaint and a rejuvenated opponent.
The Australian No.2, who had earned one of her most striking wins of the year when she outlasted the No.1 seed Elise Mertens on Tuesday, had looked set to follow suit when she went a set up in her last-16 match with Coco Vandeweghe on Wednesday.
But after not feeling well in the heat and struggling with a stomach ailment, Tomljanovic ended up losing 6-4 4-6 3-6 to the big-hitting American who's on the comeback trail after an injury-plagued few years.
"I had a pretty bad stomach ache," Tomljanovic told AAP. "It started at the beginning of the match, but near the end of the second set, it was getting worse."
Tomljanovic had already talked to the doctor on court and, while Vandeweghe was having a medical time out after accidentally cutting her left hand, the Australian asked if she could leave court to take a bathroom break at the same time. Her request was turned down.
"I guess the ruling was I couldn't do it because she was serving next. I was told if I went over the time limit (if I left court), then I could end up getting warned and time violations, so I didn't."
Perhaps distracted, Tomljanovic soon after let a 30-0 lead slip when serving at 4-4, allowing Vandeweghe the crucial break which she consolidated by serving out for the set to love.
Vandeweghe, the former world No.9 who made semi-finals at the Australian Open and US Open in 2017, is a dangerous customer on the grass and went for her shots in the third set shoot-out too.
"In a way, this is her surface, she's done well here before even though she's on a comeback," said Tomljanovic.
"Coco doesn't play like whatever her ranking is (currently 203). I just look at it as a maybe a bit unlucky to play her second round after such a good win (in three tough hours over Mertens)."
World No.72 Tomljanovic, though, could take some comfort from her performances with Wimbledon just around the corner.
"It's really hard to take too much from that because I always look at the end result and I'm definitely not happy with a week when I get knocked out in the second round.
"But at the same time, my end goal is Wimbledon and this is a good stepping stone to getting there. When I look at the quality of the matches I played, I'm pretty happy."
"I hope I can have a good run at Wimbledon. A lot of people think my game suits this surface well and I will say it's time I started believing it as well.
"After these two matches, I really think maybe this year is the best chance I have so far because I'm better mentally, I'm striking the ball the best I ever have going into Wimbledon. So that all gives me confidence."