Answer
Montella was sacked by AC Milan in 2017 after a poor run of form. He had been in charge of the club since 2015, and had led them to the Europa League final in 2016. However, the club's form had been poor in the 2016-17 season, and they were only in seventh place in the Serie A table when Montella was sacked. He was replaced by Gennaro Gattuso.