Barcelona, April 16 -- Top seed Carlos Alcaraz has pulled out of the Barcelona Open with a wrist injury.

The 22-year-old Spaniard beat Finnish qualifier Otto Virtanen in straight sets in his first-round match on Tuesday but suffered from discomfort during the contest.

Alcaraz had been due to play Tomas Machac of the Czech Republic on Thursday but following medical tests on his right wrist has withdrawn from the tournament.

"I felt my wrist give out on a return during the match. After the tests, we saw that it's a more serious injury than any of us expected, and I have to listen to my body so it doesn't affect mein the future," said Alcaraz, who was replaced as world number one by Jannik Sinner earlierthis week.

"I have to go home to sta...