On the opening game of the season, Lazović scored twice on his debut in a 5–0 win over NEC. In the opening game of the UEFA Champions League group stage, he scored in a 2–1 win over CSKA Moscow. PSV's campaign in the Champions League went poor, resulting in the club going to the UEFA Cup. In the third round of UEFA Cup, he scored and set up a goal for Timmy Simons in a 2–0 win over Helsingborgs IF in the first leg. In the second leg, he scored again with the same result as in the first round. The club would progress in the UEFA Cup until meeting Italian side Fiorentina at the quarter final. At the end of the season, the club would win the title after scoring against his former club Vitesse in a 1–0 win.