Lleyton Hewitt, Sam Stosur fly Aussie flag at Indian Wells Lleyton Hewitt hits a return during his upset win over John Isner at the BNP Paribas Open at Indian Wells. Picture: Stephen Dunn Source: AFP AUSTRALIAN veteran Lleyton Hewitt has rallied to topple world No.15 John Isner, a finalist last year, from the Indian Wells Masters. Hewitt, a former World No. 1 and two-time Grand Slam champion a decade ago, beat the top-ranked US player 6-7 (6/8), 6-3, 6-4 in a second-round match. The 32-year-old Aussie will face 18th-seeded Swiss Stanislas Wawrinka for a place in the round of 16. Hewitt, now ranked 98th in the world, won the Kooyong Classic exhibition tournament in the build-up to the Australian Open in January, but he hasn't put together back-to-back wins on the ATP Tour this year. Kevin Anderson of South Africa returns a shot to David Ferrer of Spain at the Indian Wells Tennis Garden in California. Picture: Matthew Stockman Source: AFP South Africa's Kevin Anderson pulled off the biggest upset so far ousting fourth-seeded Spaniard David Ferrer 3-6, 6-4, 6-3 in the second round. Ferrer, ranked fourth in the world, was playing his first match of the combined ATP Masters and WTA Tournament, in which the 32 men's and women's seeds receive first-round byes. Ferrer said the 37th-ranked Anderson just played better. ``He played good in important moments," said Ferrer, who was unable to convert two break opportunities in the ninth game of the second set. ``He played more aggressive, more consistent than me. And in the third set I was a little bit tired and he was better than me. In the third round, Anderson will face Jarkko Nieminen. The 31-year-old Finn ranked 57th in the world ousted another seeded Spaniard, 29th-ranked Fernando Verdasco, by 6-1, 6-0. In early women's matches, Germany's fourth-seeded Angelique Kerber reached the third round with a 6-3, 6-2 victory over Romanian Irina-Camelia Begu. Samantha Stosur hits a return to Madison Keys during day 4 of the BNP Paribas Open at Indian Wells. Stosur won 6-3, 6-4. Picture: Stephen Dunn Source: Getty Images Seventh-seeded Australian Samantha Stosur used a break of serve in each set to dispatch US teenager Madison Keys 6-3, 6-4. Stosur, the 2011 US Open champion, next faces China's Peng Shuai, who defeated Romanian Alexandra Dulgheru 6-0, 4-6, 6-3.