Daniil Medvedev shook off a mid-match ankle injury to reach the Indian wells quarter-finals with a gutsy 6-7, 7-6, 7-5 victory over Germany's Alexander Zverev, extending his winning streak to 17 matches.

It was an impressive effort from the Russian whose tournament appeared over when he crashed to the court in the second set with what initially appeared to be a serious ankle injury.

He is now expected to feel considerable pain and would likely have a scan on the ankle to assess the damage.

Medvedev said he planned to tape the ankle and take a painkiller to be good to go when he faces Spain's Alejandro Davidovich in his quarter-final.

On the other hand, Britain's Cameron Norrie defeated sixth seed Andrey Rublev in straight sets, 6-2, 6-4.

Fourth seed Taylor Fritz powered past Hungarian Marton Fucsovics.