10/10/2011 at 02:00 PM EDT
Former tennis champion and new Biggest Loser trainer
Anna Kournikova says there are no impending wedding bells for her and her longtime boyfriend, Enrique Iglesias – but that doesn't mean babies aren't in her future.
"I absolutely want to have children, whether I have my own or adopt," Kournikova, 30, says in the November issue of Women's Health
magazine, on newsstands Oct. 18. "I love taking care of people."
After a series of injuries forced her to retire from tennis in 2003, at age 21, Kournikova devoted herself to charity work. Now, the certified personal trainer is spending most of her time embracing her new role on The Biggest Loser
. She often arrives early so she can exercise on her own for an hour before working with the contestants.
Right now, tying the knot just simply isn't a priority for her and Iglesias, 36
, she adds.
"[Marriage] isn't important to me. I'm in a happy relationship – that's all that matters," Kournikova told Women's Health
. "I believe in commitment. I believe in being open and trusting each other and respecting each other completely."