British No 1 Tim Henman (left) believes he might have finally hit upon the right formula for Grand Slam success after linking up with new coach Paul Annacone.

Pete Sampras's former mentor has instilled a sense of confidence and aggression into Henman's game which proved too much for Frenchman Jean-Rene Lisnard in yesterday's first-round match in the Australian Open.

The British No 1 from Oxfordshire roared to a convincing 6-2, 6-4, 6-2 victory in front of a patriotic crowd in the Margaret Court Arena.

"I think it's important that I'm committed to my style and committed to the way I want to play," he said.

Next up for Henman is Czech No 2 Radek Stepanek.

Meanwhile, Andre Agassi's march towards a fifth Australian Open title continued unabated with a quick-fire straight sets victory over Czech Tomas Berdych today.

The defending champion stunned 18-year-old Berdych 6-0, 6-2, 6-4, stretching his unbeaten run at Melbourne Park to 23 matches.

Top seed Andy Roddick had no trouble in his second-round match against Bohdan Ulihrach of the Czech Republic, winning 6-2, 6-2, 6-3 in a, blistering display that lasted just 73 minutes. He fired down 20 aces.

In the women's signles, fourth seed Amelie Mauresmo cruised into the third round with a straight sets victory over Slovakian Ludmila Cervanova, but two more seeds fell as Russian Elena Bovina (21) and Bulgaria's Magdalena Maleeva (24) both bowed out.