Emma Raducanu says she is feeling the benefits of a more rigorous fitness regime as the US Open champion prepares to continue her French Open campaign.
The 19-year-old plays Aliaksandra Sasnovich of Belarus in her second-round match on Wednesday.
Raducanu battled from a set down to overcome Czech teenager Linda Noskova in her Roland Garros debut.
"I think that it is definitely improving," Raducanu said when asked about her fitness.
"One thing that I have been doing in the lead-up for this week and the whole of last week, I was doing a lot in the gym.