Four-time champion Novak Djokovic moved into the semi-finals of the Italian Open on Saturday as he beat Juan Martin del Potro 6-1, 6-4 in their delayed quarter-final match. Djokovic was leading 6-1, 1-2 before heavy rain Friday night caused the conclusion of the match to be postponed by a day.

Djokovic resumed a set up early on semi-final day and he kept composed to come through a potentially difficult contest, grabbing a break and serving out the match.

Djokovic waved his arms to get the crowd behind him as the set wore on, dictating play from near the baseline while del Potro stood further back retrieving balls in the corners. Also Read: Sania Mirza-Yaroslava Shvedova knocked out of Rome Masters

Djokovic will play Dominic Thiem, who beat Rafael Nadal in the quarters, later in the day for a place in the final. Saturday’s other men’s semi-final will see John Isner face Alexander Zverev.

In the women’s tournament, Simoana Halep will face either Garbine Muguruza or Elina Svitolina in Sunday’s final. The fourth-ranked Halep advanced to the final and extended her clay-court winning streak to 10 matches by defeating Kiki Bertens 7-5, 6-1 in the semi-final.