The world No. 1 was thrown off by Siegemund's changes in pace and rhythm, but came through in three tight, tense sets.

Aryna Sabalenka was having a hard time dealing with her Wimbledon quarterfinal opponent’s unusual game style. The mistakes were mounting Tuesday. The stress was rising. The deficit was troubling. As things went awry,

Aryna Sabalenka was forced to dig deep in the Wimbledon quarter-finals on Tuesday, as the world No 1 fended off a spirited challenge from 37-year-old doubles specialist Laura Siegemund.