FC Sion appoint Grosso as head coach
Grosso started his senior managerial career with Bari in 2017 before joining Hellas Verona in 2018.
Following his dismissal in May 2019, he took over Serie A club Brescia in November but was sacked after just three games in charge.
Sion finished eighth in the 10-team Swiss Super League last season, avoiding a relegation play-off by just one point.