Andy Murray's struggles continued with a 6-3, 6-3 loss to lucky loser Borna Coric in the third round of the Madrid Open on Thursday, while defending champion Novak Djokovic and four-time champion Rafael Nadal made it to the quarterfinals.
Coric, 59th in the world, won 6-3 6-3 as the Scot's desperate pursuit of consistency went on.
The Croatian arrived at the tournament in good form following his first Association of Tennis Professionals (ATP) Tour title in Morocco in April.
The 20year-old will face either Grigor Dimitrov or Dominic Thiem in the quarter-finals.
"I made a lot of unforced errors and I also didn't find any way to make it a more competitive match, so that's the most disappointing thing for me".
"I didn't help myself find a way into the match to start playing better", said Murray. "That was disappointing because you're not always going to play your best tennis but you can still find ways to make it hard for your opponent and I didn't do that today".
Rain in the Spanish capital meant the roof on the Manolo Santana court was closed for the game, slowing down Lopez's powerful serve to the advantage of the Serb, who recently split from his long-term coach Marian Vajda. But after failing to capitalise the Scot looked distracted as he remonstrated with his coaching staff as the second set went with serve until a bad eighth game from Murray gifted Coric the break once more.
The head-to-head record between the two is now tied at 2-2.
David Goffin awaits the victor of that clash after the Belgian beat world number six Milos Raonic 6-4, 6-2.
Djokovic will now face Japan's Kei Nishikori-who defeated David Ferrer 6-4, 6-3 in his third round clash-in the last eight contest scheduled for tomorrow.
Murray had two break points of his own in the next game but he could not take them and he was becoming increasingly irked at how the match was panning out as it reached a crucial stage at 4-3 to Coric. "I think Feliciano played really well, especially in the second set".
"I was a little bit nervous, to be honest, before the match, because she has a big serve", Halep said.
Twenty-year-old German Alexander Zverev continued his fine form after claiming his second title of the year in Munich last week as he ousted 11th seed Tomas Berdych 6-4, 6-4.
Women's defending champ Simona Halep has crushed American Coco Vandeweghe 6-1, 6-1 to reach the semis.