LONDON (AP) - Hard work seems to be paying off for Mary Pierce.

The two-time Grand Slam champion followed up her surprising run to the French Open final by advancing Saturday to the fourth round at Wimbledon.

The 30-year-old Pierce beat 17-year-old Ana Ivanovic 6-1, 6-4, and said diligent training and experience helped her win.

"I just see things differently, do things differently," said Pierce, who matched her best showing at Wimbledon since 1996. "There's not really any secrets to anything. Hard work always pays off."

Pierce, seeded 12th, conceded only six points on serve in the second set.

"I just feel like I'm really on a good path right now and just continue every day trying to improve and keep working hard," Pierce said. "Last year I lost first round, so I'm definitely doing a lot better than last year. I just feel like I'm improving with every match I'm playing on grass."

Pierce also won in mixed doubles, teaming with Mahesh Bhupathi to beat David Sherwood and Elena Baltacha 6-3, 6-4 in the first round.