Two-time US Open finalist Caroline Wozniacki began 2015 knowing she had a tough act to follow after a resurgent year that saw her become World No.1 Serena Williams’ closest rival over the final six months of the 2014 season. Reaching the final of her first tournament of the year at the ASB Classic, the Dane appeared ready for the challenge.

“I love to push myself to the limits,” she explained at the Huajin Securities WTA Elite Trophy Zhuhai. “That’s when I play my best tennis on the court.”

A favorite to go deep at the Australian Open, Wozniacki ran into fellow former No.1 Victoria Azarenka and fell in the second round. Dropping a second straight match to Azarenka in Doha, she bounced back to win her only title of the season in Kuala Lumpur, and parlayed that momentum into some of her best tennis at the Porsche Tennis Grand Prix in Stuttgart.

“I had a good first half of the year. I was healthy and playing well and I played some of my best tennis, especially on the clay season. I played some great tennis.”

Reaching her third final of 2015, Wozniacki won a thrilling three-setter against top seeded Simona Halep, narrowly losing the final to Angelique Kerber.

A back injury interrupted her grass court season, and more bad luck would follow as the Dane prepared for what is typically her favorite time of year.

“In my first training back I hurt my calf, and US Open Series is the time when I love to play and where I normally play my best tennis.

“Not being able to do that was frustrating.”

Dropping a final set tie-break to an inspired Petra Cetkovska at the US Open, Wozniacki nontheless had a solid Asian Swing that allowed her to remain in contention for a second straight appearance in the BNP Paribas WTA Finals Singapore presented by SC Global before losing to Kerber for a second time at the China Open.

Aspiring for stronger results in 2016, the former No.1 plans to create a schedule that she hopes will bring out her best tennis on the biggest stages.

“I think I’m just going to, yeah, try and peak at the right moments and make sure that I have enough matches under my belt for the Slams, but also that I don’t overdo myself.

“Obviously I want to win everything, but peak at the right moments.”

A consistent force for over half a decade, it’s safe to say that the 25 year old still has a few more peaks left in what has already been a glittering career.