Sims was selected to be a member of the team representing the USA at the 2013 Summer Universiade held in Kazan, Russia. The team, coached by Sherri Coale, won the opening four games easily, scoring in triple digits in each game, and winning by 30 or more points in each case. After winning the quarterfinal game against Sweden, they faced Australia in the semifinal. The USA team opened up as much as a 17 point in the fourth quarter of the game but the Australian team fought back and took a one point lead in the final minute. Crystal Bradford scored a basket with 134 seconds left ant he game to secure a 79–78 victory. The gold medal opponent was Russia, but the USA team never trailed, and won 90–71 to win the gold medal and the World University games Championship. Sims was the third leading scorer for the team, averaging 12.7 points per game. She led the team in assist with 32, and steals with 12. She was named co_MVP of the tournament, along with Russia's Tatiana Grigoryeva.