Czechia’s Karolina Muchova is facing criticism from the tennis community for taking an extended pause during her quarterfinals win over Sorana Cirstea on Tuesday night at the U.S. Open.

Karolina Muchova is back in the U.S. Open semifinals for the second straight year, punctuating her return from wrist surgery by beating No. 22 Beatriz Haddad Maia 6-1, 6-4 on Wednesday. Muchova ...