Novak Djokovic fights back to book place in French Open semi-finals

Novak Djokovic celebrates winning his quarter-final match (Thibault Camus/AP)

Novak Djokovic lost his first set of the French Open but battled back to defeat Karen Khachanov and move through to the semi-finals.

The third seed looked like he could be in trouble when he was pushed to a second-set tie-break after dropping the opener, but he won seven straight points and pulled away to win 4-6 7-6 (0) 6-2 6-4.