 In February 2013, the 30-year-old Ustaritz moved abroad for the first time, signing with FC Dinamo Tbilisi in Georgia and sharing teams with several compatriots.He played six games over the remainder of the season as his team won the Premier League, scoring in a 6–1 win over FC Zestafoni in the last fixture on 18 May; four days later, a double was secured with a 3–1 success against FC Chikhura Sachkhere in the Georgian Cup final, with the player being dismissed late on.In the summer, Ustaritz scored two goals in four games in Dinamo's unsuccessful qualification campaign for the UEFA Champions League.