Indian Wells: Juan Martin del Potro beat another seeded player in the BNP Paribas Open, defeating No. 32 Philipp Kohlschreiber 7-6 (3), 7-6 (7) in the fourth round on Wednesday.
Del Potro, from Argentina, improved his match record to 17-4 this year as he rebounds from an injury-marred 2010. He has surged from No. 484 to 90th in the world rankings in a three-week span, winning a title at Delray Beach, Florida, and reaching the semifinals in two other tournaments.
"I am playing better than two months ago. I know it's a long road, but I'm still improving my serve, my forehand," he said. "It's very tough to play every day against these kind of players, and I need time to feel 100 percent again."