The Real Madrid star ends a 14-year career representing the Red Devils, with 126 caps and 33 goals
Acerbi joined the Nerazzurri on loan in the off-season, with an option to buy, and was relieved to part ways with Lazio after his relationship with the club and supporters deteriorated. The 34-year-old insisted that his exit was not due to head coach Maurizio Sarri, whom he admires, but rather an incident which was blown out of proportion. After scoring in the 3-1 win over Genoa in December last year, Acerbi put his index finger to his mouth as a 'keep quiet' gesture.
Portugal completed the quarter-final line-up with a 6-1 dismantling of Switzerland on Tuesday.