BRISBANE (Australia) (AFP) - Top seed Ana Ivanovic saved two match points against Italy's Roberta Vinci as she struggled to a 6-7 (4/7), 7-5, 6-1 win in their second round match at the Brisbane International on Wednesday. Ivanovic was expected to easily win the clash with the Italian qualifier but found herself on the back foot right from the start. The 83rd-ranked Vinci played some inspired tennis over the first two sets, breaking the Serbian world number five as early as the fifth game. She held the advantage for most of the opening set and although Ivanovic broke back to take it into a tie-break, Vinci continued to dominate and wrapped up the set in just over an hour. Vinci broke again early in the second, but Ivanovic struck back immediately and somehow managed to hang on despite the Italian playing the better tennis. Vinci continued to attack Ivanovic's second serve and at 5-4 she had two match points at 15-40. But the top seed dug herself out of trouble, then broke Vinci and served out the second set. The Italian, who had played above herself to stay with Ivanovic as long as she did, was a spent force and ran out of steam in the final set as Ivanovic wrapped up the match in two hours 36 minutes. "At the start of the match I was too far back and was defending much more than I should have," Ivanovic said. "She was dominating much more and I found it hard. But I tried to fight and hang in there. "In the third set I started doing really well and I could tell she was a little bit tired, she wasn't moving as well and I tried to use that." Ivanovic will take on Amelie Mauresmo in the quarter-finals after Mauresmo downed countrywoman Julie Coin in an epic second round clash. Mauresmo beat Coin 5-7, 6-2, 7-6 (13/11) in a superb three-and-a-quarter hours match that belied the difference in class and experience between the two players. The match was the longest of Mauresmo's career, eclipsing the three hours seven minutes she took to beat Mary Pierce in the final of the 2005 Tour Championship. The final set alone lasted 89 minutes as Mauresmo came from 2-5 down to force a tie-break. "I said to myself, 'it's only one break of serve so if I can win my serve and put a bit of pressure on hers, you know it could happen that I go back to five-all,' which it did," she said. Mauresmo had five match points in the tie-break and Coin three, with the result in doubt right up until the moment Coin hit a backhand long over the baseline. Italian Sara Errani reached the last eight with another marathon match, beating Bulgaria's Tsvetana Pironkova 6-7 (3/7), 7-5, 6-3 in three and a half hours. Belarusian Olga Govortsova ended Bulgarian qualifier Sesil Karatantcheva's run with a 6-0, 5-7, 7-5 victory in two hours 18 minutes, the shortest women's match of the day.