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.

Sabalenka fought back from the brink of a shock exit to reach the semi-finals with a gutsy 4-6, 6-2, 6-4 win against Germany's Laura Siegemund. Sabalenka twice trailed by a break in the final set on Centre Court and was two games away from crashing out before staging a dramatic revival to win in two hours and 54 minutes of unrelenting tension.