MADRID (Reuters) -Three-time champion Novak Djokovic may have played at the Madrid Open for the last time after crashing out in the second round to Italian Matteo Arnaldi on Saturday, with the Serbian admitting he did not know if he would return.

Arnaldi beat fourth seed Djokovic 6-3 6-4 to reach the third round. The result condemned the 37-year-old, who received a bye in the opening round, to his third consecutive defeat.