Kalivas was one of eight American-born players that competed for the Greece women's national football team at the 2004 Summer Olympics. She participated in the build-up to the Olympic tournament by playing in several friendlies, including a draw with Russia on 22 February 2004. She made two appearances at the final tournament as Greece finished last.
Personal life
Kalivas is married to fellowfootballerMartha West, whom she met when playing on opposite sides in a New York Metropolitan Women's SoccerLeague game. Before the wedding Kalivas and West played a football match, captaining teams consisting of their friends and family, to decide who would take the surname of whom. The match ended in a 1–1 draw, so they decided they would both keep their names.