BRISBANE (AFP) - A rusty-looking Ana Ivanovic overcame a poor service game and some patchy groundstrokes to beat unheralded Czech Petra Kvitova 6-4, 6-2 in round one of the Brisbane International Monday. The top seed and former world number one got only 61 per cent of her first serves in and struggled to win any points on her second, but still managed to overcome world No. 50 Kvitova in one hour and 44 minutes. Ivanovic appears to have an easier second round against Italian qualifier Roberta Vinci. But she will need to improve if she is to challenge for the title here, let alone the Australian Open in two weeks' time."I had to fight for each point and you know that's good, especially in the first match. You want to get into your rhythm and you want to stay tough for each point," Ivanovic said."She was a tough opponent for a first round - she likes to hit the ball very flat."The end of last season was a bit of a disappointment for me so I was looking forward to a good start." Earlier fourth seed Daniela Hantuchova of Slovakia was an early high-profile casualty when she crashed out to Italy's Sara Errani, who recovered from losing the first set in a tiebreak to win 6-7 (1/7), 6-4, 6-0. The tournament also lost eighth seeded Italian Francesca Schiavone, beaten 7-5, 6-2 by Olga Govortsova of Belarus, and ninth seed Ai Sugiyama, who was bundled out by local favourite Samantha Stosur 6-2, 6-3.Former world No.1 Amelie Mauresmo was pushed all the way by Australian wildcard Jelena Dokic before winning 7-6 (11/9), 7-6 (7/5).Dokic was a former top five player before some well documented personal problems with her father forced her from the tour. She is making one more bid to re-launch her career and showed enough against Mauresmo to suggest she could once again be a force in the women's game. However, her lack of exposure at the top level showed in the crucial points, allowing Mauresmo to escape with a narrow victory."I'm feeling better than last year already," a relaxed Mauresmo said."There were some good things and some things that need to be improved but it's a win, so that's perfect." Stosur, from the nearby Gold Coast, caused a minor upset when she downed Japanese veteran Sugiyama. The Australian had originally been drawn to play seventh seed Maria Kirilenko in the first match of the tournament, but when an ill Kirilenko withdrew on Sunday morning, Sugiyama was elevated to ninth seed and had to face Stosur. Sugiyama, who had been due to play a qualifier in the first round, said the re-draw had upset her preparations. "It was much tougher (facing Stosur) than a qualifier ranking-wise, but I just tried to focus on my game, but today I wasn't sharp enough," Sugiyama said. In other matches, French qualifier Julie Coin downed Belgium's Yanina Wickmayer 7-5, 6-7 (5/7), 7-6 (7/3) and Vinci beat fellow qualifier Anna-Lena Groenefeld of Germany 0-6, 6-3, 6-1. Melinda Czink of Hungary downed Ukraine's Alona Bondarenko 7-6, 6-1, Lucie Safarova beat Australian wildcard Isabella Holland 6-4, 6-3 and Tathiana Garbin of Italy defeated Sweden's Sofia Arvidsson 6-2, 6-3.