Men's singles in pictures: Day four

Andre Agassi slips on the greasy turf on Centre Court

Agassi then berates referee Alan Mills over the wet surface

Tim Henman leaps to smash Arnaud Clement in his victory over the Frenchman

Thomas Johannson celebrates beating fifth seed Yevgeny Kafelnikov

Gustavo Kuerten powers his way over American qualifier Justin Bowers

Arvind Parmar stretches to reach a Marc Rosset shot

Pat Rafter returns to fellow countryman Todd Woodridge

Marat Safin cannot hide his frustration as he is beaten by Martin Damm