Rafael Nadal is preparing for his first major test as week two starts tonight at Wimbledon after a rest day.
Nadal faces the Argentine powerhouse Juan Martin del Potro, who rose to fourth in the world rankings with his US Open win two years ago.
22 year old del Potro has regained his fitness and form after most of last year off with a wrist injury, and this is the first time he's reached Wimbledon's round of 16.
Serena and Venus Williams loom large over the women's draw.
Serena's round of 16 opponent is the 9th seed Marion Bartoli from France, the 2007 runner-up.
Venus plays the Bulgarian Tsvetana Pironkova who made the semi-finals last year.