On Saturday, the 4-seed Djokovic took on unseeded Matteo Arnaldi in their first-ever meeting. Arnaldi defeated Djokovic in straight sets during their second-round match at the Madrid Open: 6-3, 6-4.

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.

Djokovic is still seeking his first title of the season after winning his 99th title last August at the Paris Olympics. He has lost four finals since then.