PARIS, March 27 — Novak Djokovic and Goran Ivanisevic are to go their separate ways, the tennis world number one announced on Wednesday, ending a five-year association which yielded 12 Grand Slams.

Djokovic brought Croatia’s 2001 Wimbledon champion on board as a member of the coaching team ahead of the grass court Grand Slam in 2019 and although the Serbian admitted their “on-court chemistry had its ups and downs”, it also resulted in huge success.