MOSCOW, June 26 (RIA Novosti) - Russia's Dementieva, Petrova and Vesnina all made their way through to the fourth round of Wimbledon on Friday.

Twenty-seven-year-old Elena Dementieva trounced her unseeded compatriot, Regina Kulikova, in just under an hour 6:1, 6:2 to set up a fourth round meeting with another Russian, Elena Vesnina.

Vesnina, ranked 37th in the world, dropped the second set in her three-set thriller against Slovakia's Dominika Cibulkova, seeded 14, but dug deep in the third to break the Slovak's serve and win the match 7:5, 4:6, 6:4.

Earlier Nadia Petrova, seeded tenth, was also involved in a three setter against Argentine Gisela Dulko, who dumped Maria Sharapova earlier in the week. Petrova dropped the first set but her power began to tell as she broke back to take the final two sets and run away with the match 3:6, 6:3, 6:4.

In a post-match interview Dementieva, who was the 2008 Wimbledon semifinalist, said that she had been working on her fitness following her surprise third-round defeat in the French Open.

"I took some time off after the French Open and was working on my fitness and I was more focused on the footwork and just the core build exercise. I just started to practice a couple days before Eastbourne and came there early to get used to the surface. It's really worked for me," the Olympic gold medalist winner told journalists.