His career reached a turning point when Vicenza Calcio (then Lanerossi Vicenza) engaged him on loan. Coach Giovan Battista Fabbri decided to move him from the wing and place him in the centre of the attack (because of injuries to the then centre-forward) just before the season started. Rossi immediately showed a tremendous knack for getting open in the box and scoring, winning the Serie B Golden Boot with 21 goals in his first year in this more advanced position. In the 1976–77 season, Rossi's qualities as an implacable striker led his team to promotion to Serie A, and he also led Vicenza to the second group stage of the Coppa Italia that season. In the following season, Rossi scored 24 goals, to become the first player to top the scoring charts in Serie B and Serie A in consecutive seasons, also leading Vicenza to an incredible second-place finish in Serie A during the 1977–78 season, only behind his co-owners Juventus. Due to his performances, he was selected by the Italian national team's manager Enzo Bearzot for the 1978 FIFA World Cup. Rossi was also given his Italy debut under Bearzot on 21 December 1977, in a 1–0 friendly away win over Belgium.