More disappointment for Andy Murray who failed, for a second consecutive time to reach the quarter-finals of a tournament, on this occasion the Madrid Masters where two of his main rivals. Novak Djokovic and Rafa Nadal, progressed into the last eight.
Things can change fast but you need to find exactly what it is that is going wrong and how you're going to fix that and commit to it Andy Murray
It was even more disappointing to learn that Murray himself couldn’t understand why his form had dropped off so dramatically allowing the 20 year-old Borna Coric, a lucky loser ranked 59, to dominate play and secure one of his biggest wins, 6-3 6-3.
"There were a lot of things that weren’t particularly good," Murray told BBC Sport.
"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.
"Things can change fast but you need to find exactly what it is that is going wrong and how you’re going to fix that and commit to it. And if I do that, I’m sure I can turn it round."
It was this time last year that Murray took off on the run which eventually saw him depose Djokovic at the top of the rankings so he has plenty to protect in the coming months. Unfortunately earlier, an illness, shingles and an elbow injury have rather marred his year to date.
Coric, who now goes on to meet Austria’s Dominic Thiem who in turn eliminated Grigor Dimitrov in their third round clash, was upbeat at the result. "I couldn’t imagine this when I woke up this morning, I always believed but I wasn’t sure how I was going to play. In the end I played as I had dreamed," the young Croat said.
Earlier world number two Novak Djokovic came through a tricky second set against Spain’s Feliciano Lopez to book his place in the quarter-finals 6-4 7-5 and will face Kei Nishikori in the last eight, the Japanese star having swept aside David Ferrer 6-4 6-3.
In other matches Uruguay’s Pablo Cuevas recovered from losing the second set 6-0 to beat Benoit Paire and will meet Germany’s Alexander Zverev, a 6-4 6-4 winner over Tomas Berdych while David Goffin beat fifth seed Milos Raonic 6-4 6-2 to set up a meeting with Rafael Nadal, who thumped Nick Kyrgios 6-3 6-1.