Novak Djokovic has cast doubt over his appearance at Wimbledon following a shock defeat at the French Open.
The former world number one was beaten in the quarter-finals by by Italy's world number 72 Marco Cecchinato 6-3 7-6 (7-4) 1-6 7-6 (13-11).
Djokovic, 31, required treatment to his neck during the defeat in Paris.
Following the match the Serb said he did not "want to talk about tennis right now". He added that he does not know if he is “going to play on grass”.