Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
No. 4 Victoria Azarenka wasted little time in dispatching Johanna Larsson of Sweden 6-1, 6-3.
In men's draw, fifth-seeded David Ferrer rallied from a set down to beat 78th-ranked Igor Andreev, who committed 53 unforced errors.
The Spaniard won 2-6, 6-3, 6-0, 6-4. He hasn't lost in the first round at a major tournament since 2005. Ferrer had 14 unforced errors in dropping the first set, then had only 24 the rest of the way.
Jo-Wilfried Tsonga of France, the 11th seed, went through Lu Yen-Hsun of Chinese Taipei, 6-4, 6-4, 6-4, while 19th-seed Spaniard Fernando Verdasco fought back from a set down, dismissing Jarkko Nieminen of Finland, 3-6, 6-4, 6-1, 6-4.
Other seeds progressed were 17th-seeded Jurgen Melzer of Austria, beating Eric Prodon of France, 6-2, 7-6(4), 6-2; 30th-seeded Ivan Ljubicic of Croatia, dispatching Blaz Kavcic of Slovenia, 7-6(5), 3-6, 6-1, 7-5 and 14th-seeded Swiss Stanislas Wawrinka, who rallied past Maximo Gonzalez of Argentina 3-6, 6-4, 6-1, 6-3.
Russia's Nikolay Davydenko powered off 32th-seeded Ivan Dodig of Croatia 6-7(6), 6-3, 6-0, 2-6, 6-2.
Another Russian Mikhail Youzhny, seeded 16th, become the highlight victim on Tuesday, losing to Ernests Gulbis of Latvia 6-2, 6-4, 6-4.