The world number one players have had contrasting third round victories at Wimbledon with men's number one Rafael Nadal needing five sets to beat German Philipp Petzschner, while Serena Williams beat Slovakia's Dominika Cibulkova in straight sets.
Nadal, the 2008 champion and second seed, had to battle back from two sets to one down in the previous round and was forced to do so again as doubts over his fitness were raised for the second week of the tournament with the Spaniard receiving frequent visits from the trainer for treatment on his arm and legs in the three hours and 45 minutes contest.
He'll meet Frenchman Paul-Henri Mathieu in the 4th round.
Meanwhile defending champion Serena Williams raced through the first set in just 18 minutes before beating world number 46 Cibulkova 7-5 in the second with some venomous serves.
She'll play Maria Sharapova in the fourth round.
There were wins for men's 6th seed Robin Soderling and 10th seed Jo-Wilfried Tsonga, while in the women's draw 10th seed Flavia Pennetta and 14th seed Victoria Azarenka were both beaten.
