Jack Draper faces 'big challenge' as Naomi Osaka's coach Patrick Mouratoglou has concern

Patrick Mouratoglou has raised concerns about 's fitness after his Vienna Open triumph.

The Brit and has broken into the world's top 15.

But 's coach believes Draper's real challenge will be staying injury-free as he aims to have an even bigger 2025 season.

Draper has been enjoying a breakthrough year. Twelve months ago he was ranked outside of the world's top 90 after a shoulder injury sidelined him for the summer.

Since then, the 22-year-old has reached two finals, won two titles, reached a Grand Slam semi-final and hit a career-high ranking of No. 15.

Draper has one tournament left for the season - the Paris Masters - and he's already set his sights on getting to the top of the game next year. But Mouratoglou has warned the Brit that he will need to stay injury-free if he wants to break the top 10.

The French coach has already been encouraged by Draper's rise and he's ready to see more from the two-time title winner. "I feel that now he's much more mature in terms of his game, his game plan, his game style," Mouratoglou told .

"Everything looks much more mature. And when you see him win in Vienna, you don't feel he plays out of his mind. It's his level. So I think he improved a lot this year.

"I think the big challenge for him now is to stay injury-free because he's been injured a lot for someone so young."

Draper has still faced some setbacks this year - he retired from the Japan Open and skipped the Shanghai Masters - and Mouratoglou believes he will be able to climb higher if he can resolve the physical issues.

Serena Williams' former mentor added: "If he manages to stay injury-free then I think he's definitely a top-10 player and a player that has huge weapons and potentially has no limits."

Draper has , admitting he wanted to contend with the likes of Carlos Alcaraz and Jannik Sinner. The world No. 15 is looking forward to taking some time off after the Paris Masters before he begins his pre-season training.

"I'll focus on next week and then I'm going to look forward to having a bit of time off and probably not thinking about tennis. It has been a long year and it has taken a lot out of me.

"And then I'll refresh and I'll go again for next year with even bigger motivation to really shake up those guys at the top of the game the likes of Sinner and Alcaraz."