Novak Djokovic survives five-set scare to reach French Open fourth round

• Djokovic beats unseeded Diego Schwartzman 5-7, 6-3, 3-6, 6-1, 6-1• New coach Andre Agassi raises doubts over long-term relationship The defending champion Novak Djokovic remains on track for a semi-final against the tournament's perennial prince, Rafael Nadal, that should be as titanic as any of their 50 previous meetings, although it remains unclear if the Serb will still have his new coach, Andre Agassi, with him. Related: French Open 2017: Djokovic and Nadal through, plus more, day six ...