Tim Henman breathed a sigh of relief after coming from a set down to beat Sjeng Schalken.

Henman's win late on on centre court completed another day of few shocks at Wimbledon.

Pete Sampras, Jennifer Capriati and Serena Williams all went through in straight sets, while Marat Safin needed five to get past David Prinosil.

'Pretty uncomfortable'

Greg Rusedski overcame eighth seed Juan Carlos Ferrero, but that was expected because the surface suited the Briton and not the Spaniard.

Three time finalist Goran Ivanisevic overcame youngster Andy Roddick, and he now plays Rusedski in the last 16.

Henman, who will now play Todd Martin, admitted he had made things harder than he would have liked.

"For a set and a half it was pretty uncomfortable out there. I thought I'd had a clear understanding of how I needed to play, which was to attack his serve.

Indeed the Dutchman looked completely at ease and when he broke Henman late in the first set, an upset was on the cards.

But the British number one dug deep and after a little cheer-leading to excite the partisan crowd, began to gain the upper hand.

Henman admited he was grateful for their support.

"I was not moving well and did not have great rythmn on my serve and oyu have to expect sometimes that you will flow and time things perfectly right from the start.

Tight affair

"I wasn't giving the crowd anything to work with and he was the one making all the plays and I was just reacting.

"But once I upped my game in the second set and got the break they had something to shout about."

The Briton, roared on by the now enthusiastic Centre Court crowd, converted his chance and that was enough to take the set and draw level.

The third set was another tight affair but Henman managed to gather his reserve of strength to hold on to his break of serve after achieving the feat in the ninth game.

Schalken's mood changed from his early confidence and he looked increasingly desperate as double faults crept into his game.

Henman broke the player twice in the fourth and completed his win by taking the set 6-2.