Australian Open 2012 live stream

Gisela Dulko narrowly lived up to her reputation as one of the most dangerous floaters in women's tennis with a 6-7(6) 7-5 6-4 victory over No.20 seed Ana Ivanovic in the second round at Australian Open 2010, but not without raising some significant question marks over her own form.

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It was a match high on fist pumps and on errors - 75 for Ivanovic and 71 for Dulko over the course of the two-hour, 42-minute encounter at Margaret Court Arena. Unfortunately, most of the gesticulations were empty promises of a battle that never eventuated, the combatants appearing, at times, to be playing scissors, paper, rock to decide the match outcome.

Dulko came out of the blocks fastest, breaking Ivanovic's serve in the opening game of the first set and racing to a 4-1 lead with a double break, thanks to three consecutive groundstroke errors from Ivanovic.

Ivanovic's serve was patchy at its best and outright wayward at its worst, the Serbian still unable to get on top of the haywire ball toss that has hampered her entire AO Series campaign. In spite of her woes, she managed to wrestle herself back onto level terms at 4-4 in the opener, largely due to a spate of mistakes by the Argentine.

Despite the visible inhibition in both women's play, they somehow managed to hold their serves and force a tie-breaker. It was Ivanovic's turn to take the early initiative, claiming the opening four points, but the set was far from over, Dulko reeling off five points in a row to overtake her opponent before again letting Ivanovic in with a backhand error. The Serb set up set point with a rare forehand winner from the net before Dulko committed her fourth double fault for the match, surrendering the breaker 8-6.

The second set started and ended in a mirror image of the first. This time it was Ivanovic's turn to take the early lead and she who, trailing 5-6, presented the set-deciding service break to Dulko with a double fault.

The error-laden play continued in the decider, Dulko breaking twice to advance to a 5-2 lead before an attack of vertigo struck as she served for the match. Three nervy games later, Ivanovic had secured the second break-back to trail 4-5 on serve. Almost predictably, the Serb was unable to string together the first serves she needed to draw things back to level, and some impressive Dulko forehands - by far the most penetrating aspect of her game - helped her to pull off her biggest upset since she beat Maria Sharapova in the second round at Wimbledon in 2009.

Despite the victory, it was a less-than-convincing performance by the Argentine, who will face No.9 seed Vera Zvonareva in the third round. She committed 10 double faults, managed to get just 60 per cent of first serves in, and won only 32 per cent of points off her second serve.

Following the match, Ivanovic confessed that continued tinkering with her service action had contributed hugely to her worst Australian Open showing since 2006.

"It was one of the problems, for sure," she said. "There are things I'm working on. (The) serve is a big part of that progress. I feel it's been going well at times, but it's just not consistent like I would like it to be. It just might just take some time, and I have to accept that, although it's hard."

The popular Serb, who reached the final in Melbourne in 2008, valiantly tried to take some positives from another disappointing Grand Slam showing. "I do feel better on the court. I'm playing much better. I feel like my old self," she said.

"There are still some areas that are not there for me to rely on when … I need them the most. Some matches it's there, some not. I just have to sort of keep my head up and try to improve."