Caroline Wozniacki hanging out with Wrangler the puppy at the Today Show. ( Via @CaroWozniacki )

Caroline Wozniacki credits her spontaneity as the reason she traveled to Florida to model for the Sports Illustrated swimsuit issue shortly after running the New York City Marathon last November.

“It was perfect timing because I was running so much so my body looked great for the shoot,” the 24-year-old told Today’s Show Matt Lauer on Monday morning.

The tennis star turned swimsuit model joined the show to give viewers a behind-the-scenes look at the photo shoot she calls the best she ever had and explained why she is a fan of the annual magazine issue.

“I love the Sports Illustrated swimsuit issue, especially because of the body image that it portrays,” Wozniacki said. “As an athlete, I’m never going to look like runway models and be really skinny. I’m going to always have some muscles and some definition. And to me, I find that very attractive and I think that’s a healthy way to portray women.”

[Related: Does SI swimsuit issue cover go too far? | Hannah Davis doesn’t think cover is that ‘naughty’ | Caroline Wozniacki serves up the sultry in issue]

Wozniacki, ranked No. 5 in the world, added that she felt nervous at first during the shoot that took place at Captiva Island, Fla., but the photographers made her feel comfortable and at home. In the issue, she appears in the same section as MMA champion Ronda Rousey, who posted on Instagram Monday night that she was ready to move on to her full-time job.

Award-winning sports photographer and Sports Illustrated contributor Walter Iooss “is an amazing photographer,” Wozniacki said. “I think the pictures turned out really well and I’m happy with the result.”

Wozniacki’s next tournament is the Dubai Duty Free Tennis Championships, which she won in 2011.