Stanislas Wawrinka surprised by victory over Andy Murray

Stanislas Wawrinka has admitted that he was surprised to beat Andy Murray in the third round of the Monte Carlo Masters.

The Swiss defeated the world number two 6-1 6-2 in under an hour on Thursday to reach the quarter-finals of the tournament.

"He's an amazing player. He's always tough to beat," Wawrinka told reporters. "Therefore, to beat Andy that easy was a big surprise, for sure.

"I'm playing really good, really strong, really confident with my game."

Wawrinka will face world number eight Jo-Wilfried Tsonga for a place in the semi-finals.