Ana Ivanovic of Serbia

Big guns Roger Federer, Rafael Nadal and Maria Sharapova successfully blasted their way into the Australian Open second round Monday but the Grand Slam dream of Ana Ivanovic was shattered.

Second seed Federer, third seed Nadal and sixth seed Andy Murray all enjoyed straight sets wins, with rising stars Simona Halep, Eugenie Bouchard and Grigor Dimitrov also progressing on a cool Melbourne day.

World number two Sharapova, looking for her first Australian title since 2008, swept aside Croat Petra Martic 6-4, 6-1.

It was a different story for fifth seed Ivanovic, a former world number one who came to Melbourne full of confidence after a stellar 2014 that saw her climb the rankings.

She started well against unheralded world number 142 Lucie Hradecka of the Czech Republic, easily winning the first set, but then went to pieces, eventually crashing 1-6, 6-3, 6-2.

Swiss great Federer, gunning for his fifth Australian crown and 18th Grand Slam title, had no such problems and was in full control against Taiwan's Lu Yen-Hsun.

He went through the motions for a 6-4, 6-2, 7-5 win and welcomed the workout.

His long-time rival Nadal showed few signs of the injuries that disrupted his 2014 season in dispatching Russian Mikhail Youzhny 6-3, 6-2, 6-2, conceding just one break point on his serve.

Top seeds Serena Williams and Novak Djokovic and defending men's champion Stan Wawrinka are in action on Tuesday.

Women's champion Li Na of China has retired and is not taking part, although she is a guest of honour and announced to the Rod Laver crowd that she was expecting her first child.

Murray was given a testing workout by promising Indian Yuki Bhambri before emerging a 6-3, 6-4, 7-6 (7/3) winner.

World number three Halep opened the 2015 proceedings with the wind swirling around Rod Laver Arena, carving out a 6-3, 6-2 defeat of Italy's Karin Knapp.

Seventh seed Bouchard, a semifinalist in 2014, posted a solid 6-2, 6-4 win over Germany's Anna-Lena Friedsam while 10th seed Dimitrov progressed with an easy 6-2, 6-3, 6-2 victory over German Dustin Brown.