Daniil Medvedev soared his way to world No.1 ahead of Novak Djokovic back in February, with the Serb struggling to string together games due to his unwillingness to be vaccinated.
He ended up only holding onto the No.1 spot for a few weeks though, and missed a major chance to regain the title this week by crashing out of the Miami Open quarter-finals to Hubert Hurkacz.
Now, two days after his Miami exit, Medvedev took to social media to reveal he's recently been playing with a small hernia, which has left him needing surgery.
With his recovery period likely to last up to two months, Medvedev's participation in the French Open is now in doubt, with the tournament starting on May 22.
"The last months I have been playing with a small hernia," said Medvedev on social media.
"Together with my team I have decided to have a small procedure done to fix the problem.
"I will likely be out for the next one to two months and will work hard to be back on court soon. Thanks for all the support."
Medvedev has enjoyed a lot of success in recent Grand Slams, winning the US Open last September and then narrowly losing out to Rafa Nadal in the Australian Open back in January.
The Russian star reached the quarter-finals of the 2021 French Open - the highest he's finished in the tournament throughout his career.
While he will most likely miss out on this year's event, Medvedev should be recovered and able to fit some warm-up tournaments in before Wimbledon starts on June 27.