MELBOURNE, (Reuters) – Rafa Nadal beat the rain and  his opponent in a perfect start to his Australian Open defence  as Maria Sharapova, Kim Clijsters and Justine Henin enjoyed  mixed fortunes on their returns to Melbourne Park yesterday.

Sharapova was the big loser, suffering a shock first-round  loss to Maria Kirilenko, but Clijsters and Henin won easily on a  day when everything, except Melbourne’s fickle weather, followed  the usual script.

Instead of the extreme heat that has left competitors soaked  in sweat and gasping for air, the opening day of this year’s  first grand slam was severely disrupted by unseasonal wind and  showers.

Tournament organisers closed the giant retractable roofs on  the two main courts to ensure the featured singles matches went  ahead but almost 40 matches on the outside courts were left  unfinished or rescheduled for Tuesday.

Juan Martin Del Potro and Andy Murray escaped the downpours  to ease through while Dinara Safina, Svetlana Kuznetsova and  Elena Dementieva led the Russian charge in the women’s draw.

Sharapova, seeded 14th and making her first appearance at  Melbourne Park since winning the championship two years ago,  lost 7-6 3-6 6-4 to her good friend and fellow Russian  Kirilenko.

Unable to defend her title last year because of a shoulder  injury, Sharapova was a shadow of the player who stormed to the  2008 title without dropping a set, contributing to her own  downfall with 66 unforced errors and 11 double faults.

“I could be disappointed or I could just take it as it is  and just go back on the court and just keep working. I choose  option two,” Sharapova said.

Second seed Nadal quelled speculation about his fitness with  a ruthless 7-6 6-1 6-4 victory over Peter Luczak at a packed Rod  Laver Arena.

“First rounds are always difficult to play very well,” Nadal  said. “I thought (it was) gonna be a tough match. First set was  tough. Later was easier.”

FAIRYTALE COMEBACK

Clijsters was runner-up to Henin at the 2004 Australian Open  but had given up on the idea of winning the title when she quit  the sport in 2007.

She made a fairytale comeback last year by winning the U.S.  Open, however, and launched her Australian campaign with a 6-0  6-4 win over Canadian qualifier Valerie Tetreault.

“I never expected when I said goodbye that I would be back  here,” Clijsters said. “Life can change and I changed my mind,  and so far I haven’t regretted it for a second.”

Henin romped past fellow Belgian Kirsten Flipkens 6-4 6-3  and will play Dementieva after the in-form Russian defeated  compatriot Vera Dushevina 6-2 6-1.

“I feel it’s my place to be here,” Henin said. “It’s a good  feeling to be back here.”

Murray began his latest attempt to end Britain’s long grand  slam drought with an impressive 6-1 6-1 6-2 victory over South  African qualifier Kevin Anderson, while Roddick dusted himself  off after colliding with a line judge to defeat Dutchman Thiemo  De Bakker 6-1 6-4 6-4.

Roddick, back playing after a knee injury, said he initially  feared the worst when he crashed into the official and tumbled  to the court.

“I promise you that first step afterwards was a relief,” the  American said.

BACK PAIN

Safina, runner-up in Melbourne last year, defeated  Slovakia’s Magdalena Rybarikova 6-4 6-4 despite still trying to  rebuild her fitness after suffering back pain late last year.

“At the end of the last year I was tired, exhausted, like I  had no more fun on the court,” she said.

“But now I feel like I’m back and I’m enjoying every  moment.”

There was no repeat of the violent ethnic clashes that have  marred the start of the tournament in recent years with security  adopting a firm stance.

Police ejected 11 spectators for carrying a flare then  standing on seats during Croatian Ivo Karlovic’s five-set win  over Czech Radek Stepanek.

“Security processes and procedures are very tight,” police  superintendent Jock Menzel said. “We won’t tolerate poor  behaviour and we’ve demonstrated that this morning.”