- Djokovic prevails 7-5 7-6
- Won 15 straight sets against Nadal
- Advances to semifinals in Rome
- But may face fine for making contact with umpire
(CNN)Novak Djokovic edged Rafael Nadal in a titanic tussle but may face a fine after the Serb pushed away the chair umpire's arm in the 7-5 7-6 (7-4) victory in Rome.