Taylor Fritz has recovered from a mid-match lull during which he was treated by a trainer for a foot problem and reached the Wimbledon semifinals for the first time with a 6-3, 6-4, 1-6, 7-6 (4) victory over Karen Khachanov.

Fritz’s third-set mini-crisis was closely followed by the latest failure of the electronic umpire. Swedish umpire Louise Azemar-Engzell called 'stop' in the opening game of the fourth set on Court One when 'fault' was incorrectly called after a Fritz forehand landed well inside the baseline.

The American No. 1 had rallied from two sets down before his match was delayed despite having 42 minutes left before curfew.