Salvio scored his first goal of the campaign on 3 April 2014, netting the game's only in an away success over AZ Alkmaar, for the same competition. His only other goal that came against Porto in the Portuguese Cup semi-finals as Benfica reached the final with a 3–1 victory. On 20 April 2014, he suffered another injury, this time breaking his arm in a 2–0 win against Olhanense, as Benfica clinched their 33rd league title in the same day. Although being expected to be out for the remainder of the season, he returned to the fields just ten days later, coming on as a substitute in a 0–0 draw against Juventus, with Benfica reaching their second consecutive UEFA Europa League final. Although Salvio's season was injury-plagued, he enjoyed great success as the club won the domestic treble.
Salvio started the new season with goals against Paços de Ferreira and Vitória Sétubal. He scored his only European goal of the season, against Bayer Leverkusen on 1 October 2014. Four days later, he scored his third league goal of the season, against Arouca, and made one assist in a 4–0 home win. On 22 November, he scored twice in a 4–1 win against Moreirense in the fourth round of Portuguese Cup. On 18 January 2015, Salvio scored twice at Marítimo (0–4) in Primeira Liga. He again suffered an injury on the final day of the season, as he once again tore his ACL on his right knee, which caused him to miss most of the 2015–16 season.