Daniil Medvedev has said that he is to have a scan on his right ankle, after rolling it and taking a nasty fall during his fourth-round encounter with Alexander Zverev.
The Russian was visibly in pain after his tumble, with Zverev - who is no stranger to bad ankle injuries - walking across the net to check on his opponent.
After some strapping, Medvedev felt he was in good enough condition to continue the match. He managed to come through a very close tussle in three tight sets, but has since revealed that once the adrenaline of the match subsided, there was significant pain in that right ankle.
He will require a scan to determine whether or not he will be able to continue in the tournament, with the results expected within the next day.
When I twisted [my ankle], I thought I was going to stand up just fine. But then the pain started growing very fast, so I was like 'That is not a good sign.' I felt like I didn't break it but I felt that one of the ligaments was a little injured, so I thought I wasn't going to be able to play. It was one of the first times in my life that the physio had taped my ankle, so I decided to give it a try.
What was surprising was it was much easier to run than walk. So when I was walking I was limping and then I was running fine. When the adrenaline goes down, it will be pretty painful, so I am going to probably do a scan to see what it is and if I can continue to play.
Should he be fit enough to play, Medvedev will next face Alejandro Davidovich Fokina in what will be the Russian's maiden quarter-final at Indian Wells.