Raducanu appears confident about where her game is at heading into the final Grand Slam of the year and has shown signs of improvement in recent months.

But her schedule has been drastically reduced compared to her competitors on tour with Raducanu keen to focus more on practice sessions and avoiding any injury setbacks.

Her only hardcourt tournament prior to the US Open came at the Citi Open a few weeks ago when she made it through to the quarter-finals.

“Other times, I’m a bit confused about what’s going on.

“I’m not close to her team, so I’m not sure what’s happening there.

“I hope she’s healthy. There were a couple of matches at Wimbledon where she looked really good, but then in the last one, she seemed a little shaky.

“It’s hard to say exactly where she is. She seems to be in a better space and healthier than she was a year or two ago, so that’s good.

“But I don’t know where she is mentally in terms of her belief and the absolute commitment you need to win something big again or to be in the top 10. That, I can’t say.”

Raducanu caused a stir in her pre-tournament press conference when she was asked whether the British tennis landscape has changed since Andy Murray’s retirement.

The 37-year-old was denied one final match at Wimbledon when Raducanu pulled out of their scheduled mixed doubles match.

Murray went on to finish his career alongside Dan Evans at the Olympics as the British duo missed out on a medal.

READ MORE: Emma Raducanu ‘very sorry’ to young US Open fan after outburst at practice session