One day after police used pepper spray on an unruly section of the Australian Open crowd, calm and normal service was restored to Melbourne Park on Wednesday.

Rafael Nadal [Images] and Justine Henin [Images] moved comfortably through to the third round, preferring to concentrate on repelling their opponents rather than dwelling on Tuesday's trouble.

Victoria Police vigorously defended the use of pepper spray, saying officers had feared for their own safety during the night match between Fernando Gonzalez of Chile and Konstantinos Economidis, a Greek qualifier, on Margaret Court Arena.

"Our members are not punching bags. We are not there to be the sport of people who want to be unruly or want to cause trouble to the rest of the event. The use of the capsicum spray was in direct response to the threat that our members were under," Superintendent John Cooke told reporters.

Second seed Nadal hammered his way past Frenchman Florent Serra 6-0, 6-2, 6-2 before reflecting sadly on the events of Tuesday.

"I think this is only game and everybody have to know that, no?" the world number two mused.

He will next face Gilles Simon of France [Images] or Germany's [Images] Rainer Schuettler.

Top-seeded Henin eased up a little towards the end of her 6-1, 7-5 victory over Russian Olga Poutchkova but was never in serious trouble.

"I was well into the match and played very aggressive and I did a good job in the first [set] ...then I lost a little bit of the intensity, a little bit of the rhythm on my serve," Henin told reporters.

Her victory lined up a third-round clash with Italy's [Images] Francesca Schiavone.

Tennis mum Lindsay Davenport [Images] faces Maria Sharapova [Images] in the pick of the night matches later on Wednesday and will be followed on to court by men's sixth seed Andy Roddick [Images] who tackles Michael Berrer of Germany.

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