 Two months later on 13 July 2011, Mehmeti made his UEFA Champions League debut, where he started and played 88 minutes, in a 2–0 win against Havnar Bóltfelag in the first leg of the second round of the tournament.In the return leg against Havnar Bóltfelag, Mehmeti helped the side go through to the next round after a 1–1 draw.A month later, he scored his third goal of the season, in a 4–1 loss against Dinamo Zagreb in the first leg of the UEFA Champions League Play–Offs Round.