Madrid Open: Stefanos Tsitsipas battles past Sebastian Baez

Fourth seed Stefanos Tsitsipas was taken the distance before the Greek collected a 7-5 3-6 6-3 win over Argentinian 25th seed Sebastian Baez.

The result saw Tsitsipas's record on clay improve to 8-2 this season as he stays on track to potentially reach a third semi-final at the event.

"He made it very difficult for me. Honestly, it was demanding in a lot of ways. I had to bring the best out of my game," Tsitsipas said post-match.

"He wasn't missing much. Of course he's someone that covers and runs around the court pretty well.

"He definitely utilised that pretty well against me, being able to navigate himself throughout the entire court with ease, just gliding through the court like a cheetah."

Meanwhile, Cameron Norrie was knocked out after suffering a defeat at the hands of China's Zhizhen Zhang.

The British number one, seeded 11th in the Spanish capital, looked to be cruising when he won four games in a row to take the first set 6-2 and the second looked to be following a similar pattern.

However, the left-hander spurned five break point opportunities and his opponent, ranked 99th in the world, hit back to record a 2-6 7-6 (2) 7-6 (2) win to set up a clash with eighth seed Taylor Fritz.

Elsewhere, American Fritz saw off Chile's Cristian Garin 6-1 7-6 (4), and second seed Daniil Medvedev hit back from a set down to record a 4-6 6-1 7-5 triumph over fellow Russian Alexander Shevchenko.