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.

For the 27-year-old Fritz, this may be a "now or never" scenario, given the number of talented youngsters coming through the Tour. There are excellent odds that the likes of Jack Draper, Jakub Mensik and Joao Fonseca will be making deep runs at slams in the coming years. No American man has won Wimbledon since Pete Sampras in 2000.