MADRID -- Andy Murray's struggles continued with a 6-3, 6-3 loss to Borna Coric in the third round of the Madrid Open on Thursday, while defending champion Novak Djokovic made it to the quarterfinals by defeating Spanish veteran Feliciano Lopez 6-4, 7-5.

The top-ranked Murray was outplayed by the 20-year-old Croatian to lose his fifth match of the year.

He has won only one tournament this season and hasn't made it past the semifinals in the three clay-court tournaments he has played.

The 59th-ranked Coric will try to win his second tournament this season. He won his first career title in Marrakech, Morocco last month.