Mandy Moore took to Instagram to honor her ex-boyfriend, tennis champion Andy Roddick, on the 20th anniversary of his U.S. Open win. The actress, who dated Roddick from 2003 to 2004, shared a photo of him and posted a link to a recent GQ profile about him. Moore expressed how Roddick had been a formative part of her young adult life and congratulated him on his milestone. Although they are no longer in touch, Moore was moved by the reflection on Roddick's career and the life he has led since his victory. Roddick is now married to model Brooklyn Decker, and they have two children together. The couple first met on the set of Moore's film How to Deal, with Roddick's mother playing a role in setting them up. Despite the relationship not lasting, Moore still holds fond memories of their time together.