Andy Murray was pleased with his performance against Jeremy Chardy, but knows he faces the biggest test of the clay season so far when he comes up against David Ferrer in the quarter-finals.
Murray made it 14 wins in a row on the dirt when he saw off Chardy in four sets to earn a last-eight showdown with Spaniard Ferrer, who has won all four of their meetings on the surface - including at the same stage of the 2012 French Open.
"It gets tougher every match," Murray said. "I now play Ferrer, someone I've never beaten on clay before and have lost to at the French Open.
"I will have to play great tennis to beat him, he is a fantastic player.
"I feel like I have a better understanding of how I need to play on this surface than I did three years ago but David is a fantastic player on all surfaces. It will be a big test for me."
Murray has been a different player on clay this year, though, and Ferrer is wary of the new threat.
"Andy is much more aggressive," he said. "When he uses the different shots he has, he's one of the best players in the top three.
"I think that he's more aware of what's happening, not just on quick surfaces, but also on clay."
Monday's win over Chardy means Murray has now reached 17 grand slam quarter-finals in a row dating back to the 2010 US Open - which puts him fourth on the all-time list.
"I don't think there are loads of players that have done that," Murray said. "In terms of the history of the game, there are not loads of players that have been that consistent at these events, so that's something I look at, and I'm very, very proud of.
"I'm glad I have managed to maintain that consistency, even when I've had some tough periods over the last couple of years with the injuries and the back."
Murray and Ferrer were later joined by the likes of Roger Federer, Rafael Nadal and Novak Djokovic - the latter of whom set up a blockbuster quarter-final tie against each other.