A bizarre performance from Stan Wawrinka saw Grigor Dimitrov breeze through 6-1, 6-2 to his first masters quarter-final of the season. Wawrinka is the defending champion in Monte Carlo and seldom has a title been relinquished so easily. The Swiss No 2 played like he was in a hurry - and not in a good way. Rushing between points, Wawrinka won the first of the match and then made four unforced errors in a row to surrender his serve. Grigor Dimitrov powers a forehand from the back court in his comfortable win over Stan Wawrinka . Wawrinka, the Monte Carlo Masters defending champion, appeared out of sorts in the 6-1 6-2 defeat . The world No 9 looked listless and disinterested, rolling in 95mph first serves and ballooning groundstrokes long. He did not appear to be injured but something was very clearly wrong; four winners and 41 unforced errors cannot be put down merely to a bad day at the office. Wawrinka's coach Magnus Norman is not in Monte Carlo this week and, watching at home, he may have been glad of the opportunity to turn off the television. Dimitrov moves through to the quarter-finals where the Bulgarian will meet Frenchman Gael Monfils . Wawrinka wasn't at his finest as he failed to get on the board in the match until the fifth game . In the second, Wawrinka played a little better - he could scarcely have played worse - but still gave Dimitrov a generous helping of mistakes. The world No 11 broke early and Wawrinka served to stay in the match at 5-2 down. Four tame unforced errors later and Dimitrov was through to the last eight. The crowd on court central would have expected a thrilling encounter between two of the most expressive players on tour. Instead, they were treated to an abject and mystifying performance from Wawrinka. The 30-year-old finally got on the board in the fifth game of the match, although this was down more to errors from Dimitrov - who wasn't even playing especially well himself - than any improvement from the Swiss. But the Bulgarian broke for a third time and closed out the first set 6-1. Dimitrov and a disappointed Wawrinka shake hands at the end of the quickfire encounter .
Grigor Dimitrov plays Gael Monfils in Monte Carlo Masters quarter-final . World No 9 Stan Wawrinka looked listless and disinterested in the defeat . Defending champion didn't get on the board until the match's fifth game .