(CNN) -- Former champion Lleyton Hewitt is targeting more Wimbledon success after dumping fifth seed Juan Martin Del Potro out in the second round of the men's singles on Thursday.
Hewitt celebrates reaching the third round at Wimbledon after his straight sets victory over Del Potro.
The Australian, one of just two former champions in the tournament this year along with Roger Federer, booked himself a place in the last 32 by defeating the Argentine -- who took Rafael Nadal's place at the top of the draw -- in straight sets.
Hewitt, 28, prevailed 6-3 7-5 7-5 against a player eight years his junior, and told reporters he can continue to challenge the game's current top men on grass.
He said: "I think if the draw opens up and the body feels good -- and I can execute that kind of style of tennis over five sets -- there's no reason why I can't put a bit of pressure on these guys."
Hewitt is down to 56th in the world rankings but, having won the 2002 title, is a genuine contender in what appears the weaker half of the draw.
Hewitt should fancy his chances of progressing further, with Philipp Petzschner of Germany awaiting in the third round.
Later, British number one Andy Murray thrilled the crowds on Centre Court as he eased into the third round with a comfortable victory.
The British third seed went through his full shot-making repertoire to beat Latvia's Ernests Gulbis 6-2 7-5 6-3 in one hour and 28 minutes.
It was an impressive demolition from Murray, who stepped up a gear from his unconvincing opening win over American Robert Kendrick.
The Scot told Press Association Sport: "I had a few nerves and tension in the first match but today I was a bit more relaxed and it was good.
"I was very happy with the way I played. If I serve like that for the rest of the tournament I'll have a good chance," he added.
Elsewhere, sixth seed Andy Roddick, twice been a runner-up at Wimbledon, dropped a set for the second round in a row before beating Russian Igor Kunitsyn 6-4 6-2 3-6 6-2.
Having struggled at times against both Kunitsyn and first-round opponent Jeremy Chardy, the American will have to raise his level of performance against 26th-seed Jurgen Melzer in the third round.
Melzer knocked out German Benjamin Becker, for his second straight-sets win and, although the Austrian has lost all of his eight previous career matches against Roddick, none have been played on grass.
Eighth seed Gilles Simon recovered from a slow start to eliminate Brazilian Thiago Alves, the Frenchman winning 5-7 6-3 6-4 6-4 to set up a third-round clash with 31st-seeded Romanian Victor Hanescu, who knocked out France's Nicolas Devilder in straight sets.
Another Romanian, Victor Crivoi, was swept away by 12th seed Nikolay Davydenko, losing 6-4 6-4 6-2 to the in-form Russian.
Spain's David Ferrer, seeded 16th, knocked out Fabio Fognini for the loss of just seven games, while 20th-seeded Czech Tomas Berdych also crushed Frenchman Paul-Henri Mathieu in straight sets.
Meanwhile, Fernando Gonzalez fought back from a set down to take his place in the next round, the 10th seeded Chilean winning 6-7 6-4 6-4 6-4 against Argentine Leonardo Mayer.
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