sentences:  Gignac made his official debut with Tigres on 15 July in the away game of semi-finals of the 2015 Copa Libertadores against Brazilian side Internacional at the Estádio Beira-Rio, a 2–1 defeat.In the second leg, he scored his first goal to open a 3–1 victory, taking his team into the finals against River Plate of Argentina.After losing the 2015 Copa Libertadores finals, Gignac debuted in the Apertura 2015 season of Liga MX on 9 August, scoring in a 2–2 draw against Guadalajara at the Estadio Universitario.