By Press Association
Published: 11:08 BST, 11 August 2020 | Updated: 11:29 BST, 11 August 2020
British number one Johanna Konta revealed she suffered from heart palpitations in her first-round defeat to Marie Bouzkova at the Lexington Open in Kentucky.
In just the second game of her 6-4 6-4 loss she appeared to be breathing heavily and needed a medical timeout as doctors checked her pulse and blood pressure.
She was able to return to court but lost her first match back on the WTA Tour since March.
Johanna Konta returned to action with a defeat against Marie Bouzkova in Kentucky
Konta said it was the fourth time she had suffered the problem and it was a different ailment to the one that had seen her collapse at the US Open and Fed Cup in recent years.
'I'm fine, I sometimes have a heart palpitation and basically my heart rate shoots up for no reason,' she said. 'We didn't have a long point or I wasn't gassing in