Ana Ivanovic, who hasn't won a Grand Slam title since the 2008 French Open, is aiming for another major championship in 2015. The former No. 1 hasn't reached a semifinal at the Slams since 2008, but had a strong year in 2014, finishing No. 5.

“I use more variety, I come to the net more often,” Ivanovic told The Sport Review. “I just enjoy building on my game. I really feel I have the game to be at the top. I was No. 1 before, and I want to give myself the best chance to get back there. So I’m really working hard to get back. And of course to win another Grand Slam is my dream.”

From 2009-2013, Ivanovic failed to finish a season inside the Top 10. The Serbian said that over the past six years, the competition has improved. “I think women’s tennis has changed over the years, and the depth we have now compared with 2008 is much bigger,” she said. “It’s a very hard road, and I’ve been really struggling the last few years, so to have this victory, I really appreciate it much more now.”

The 27-year-old says that she is now pushing the best players, including No. 1 Serena Williams. Ivanovic beat Williams in the fourth round of the Australian Open, and suffered a couple close losses at Stanford and the WTA Finals.

“Having more success at the Slams next year is definitely my main goal for 2015,” she said. “It’s very encouraging to consider that I finished fifth even though I didn’t have good results in the biggest events, the Slams. One of the most encouraging sides was that I was able to beat the very top players: Serena, Sharapova, Halep, for example. The next step is to do it more consistently at Grand Slams. I really believe I can do it, and that’s what it will take to win another Grand Slam.”