A defensive midfielder, Vicini started playing football with his hometown side Cesena. He began his professional career with Lanerossi Vicenza, helping the team to Serie A promotion the following season, after winning the 1954–55 Serie B title, and subsequently making his Serie A debut on 25 September 1955 in a 2–0 home defeat to Inter. He later moved to Sampdoria, playing with the club for 7 seasons in the top division, before moving to Serie B club Brescia. He made his club debut on 15 September 1963, in a 4–0 away defeat to Varese, narrowly missing out on Serie A promotion during his first season with the club. The following season, he won the Serie B title with the club, finally achieving Serie A promotion after 17 years. After suffering relegation, the team immediately won back Serie A promotion the following season. Vicini ended his playing career during the 1967–68 season, when he became the club's manager midway through the season, although he was ultimately unable to save the club from relegation, despite impressing with his performances.