Novak Djokovic and Roger Federer survived five-set struggles at the French Open on Tuesday to set up a mouth-watering semi-final where the Swiss legend will attempt to shatter the world number one's Grand Slam dream.

Top seed Djokovic saved four match points against Jo-Wilfried Tsonga before pulling off a nail-biting 6-1, 5-7, 5-7, 7-6 (8/6), 6-1 quarter-final win.