Alcaraz labored past Damir Dzumhur 6-1, 6-3, 4-6, 6-4 in the night session, coming from a break down in the fourth set.

Davidovich Fokina will battle the world No. 2 in an all-Spanish affair at the Real Club de Tenis Barcelona-1899 come Friday.

"It is true that I have said to the supervisor that I felt the need to hit the umpire because of what he has done to me," Damir Dzumhur told Tennis Majors after being defaulted against Botic van de Zandschulp in Acapulco qualifying.