Argentina's Juan Martin del Potro dug deep into his competitive reserves to pull out a 6-7 (5-7), 7-6 (7-3), 6-4, 6-4 victory Wednesday over France's Edouard Roger-Vasselin in French Open second-round action.

Del Potro was able to rally for the win despite struggling with pain in his left knee, which was heavily wrapped during the match.

The six-foot, six-inch Argentine let the first set slip away after grabbing an early break, but turned the match around by winning the second set tiebreaker and then dominated the final two sets.

He finished the contest off by converting his second of three match points to advance to a third-round showdown against Croatia's Marin Cilic.

In the post-match press conference, the 2009 U.S. Open champion responded to questions about his troublesome knee.

"This is an injury that really bothers me when I'm trying to find the right stance when I'm serving. You know, if you're not strong enough on your legs, it's difficult for you to play some shots more than others, by the way. This is something difficult to manage."

Referring to the tall, hard-hitting Cilic, Del Potro said there were many similiarities between their games.

"The way he plays tennis is similar to my way of playing tennis. He's really an attacker. He's really someone who serves well. He's dangerous," Del Potro said.

Fellow Argentine Horacio Zeballos, meanwhile, was eliminated by South Africa's Kevin Anderson 6-3, 3-6, 6-3, 6-0.

In action Wednesday involving Spanish players, Fernando Verdasco rallied to take out Luxembourg's Gilles Muller 6-7 (5-7), 6-3, 6-2 6-2, Pablo Andujar fell to Switzerland's Stanislas Wawrinka 7-6 (7-3), 6-7 (4-7), 6-2, 6-1 and 2003 champion Juan Carlos Ferrero lost to Cilic 7-6 (7-4), 6-2, 6-3.

The French Open is the second Grand Slam tournament on the tennis calendar and the only one of the four played on clay. EFE