PERTH (AFP) - A resurgent Jelena Dokic believes her time away from the game allied to her mental strength will help her climb the rankings after helping Australia reach the next stage of the Fed Cup. The former world number four shocked the tennis world when she returned from the wilderness to reach the last eight at the Australian Open as a wildcard in only her second Grand Slam appearance since 2004. The 25-year-old admitted she was worried about how she would follow her stirring comeback in Melbourne but she won all three of her singles matches here in straight sets, including her clash in Saturday's final against New Zealand. Her performances helped the host nation to victory in Asia/Oceania Zone Group I of the women's team tournament, earning Australia a tilt at promotion to World Group II in April. Speaking after beating little-known New Zealander Dianne Hollands, Dokic said her performances since the start of the year showed she was handling the pressure of her comeback. "Especially the first two matches (here), I think I played well," said Dokic, who was appearing for Australia in the Fed Cup for the first time since 2000. "Even when you don't play well there are a lot of positives to take out of matches," the world number 91 said. "Today I was able to come back. That is what I have been doing since the Australian Open and I did it again today. I am on top of it mentally and really strong mentally." But she remained wary. "I can still have a couple of bad months, no one plays well every week," she said. Dokic renounced citizenship in her adopted country to represent Serbia and Montenegro and has put her decision down to her domineering father Damir, describing it as the worst mistake of her life. An initially indifferent Australian public was won over when Dokic bared her soul after surviving the first round in Melbourne, describing how her career spiralled out of control and she was left depressed and estranged from her family. Dokic, who reached the Wimbledon semi-final in 2000, is throwing herself into an arduous schedule this season but said she is hungry to play every week. "I will try to play as much as I can. I have no injuries and I think I have really kind of preserved myself for the last four years, so I am really a lot fresher than some of the other players." "As long as I am there with my head and doing it right the game can always come," added Dokic. , who reached her career-high ranking of number four in August 2002. Dokic now heads to the United States but is eyeing the French Open in May, the season's second Grand Slam. Importantly for Dokic, her rapid ranking rise from 178 in the rankings at the end of 2008 after the Australian Open will ensure her a spot in the main draw at Roland Garros. "I have a long year ahead of me. The French Open is the next Grand Slam and I am in the main draw, which is great, which was one of the main aims this year to be in the main draw for the French or Wimbledon," she said. "I have put myself in a great position to be in the main draw in most of the tournaments and you take it week by week and keep on working hard."