It was initially speculated that he would compete with Claudio Marchisio for a spot alongside Andrea Pirlo, but Juventus manager Antonio Conte instead played all three effectively in a three-man midfield in his 3–5–2 formation.Vidal was an integral part of the 2011–12 Scudetto-winning side that went undefeated the entire season.Vidal's professional debut came in the first leg of the 2006 Apertura Tournament final against arch-rivals Universidad de Chile.
During the tournament he played central midfield and helped the team to qualify for the 2007 FIFA U-20 World Cup where Chile finished in third place with Vidal scoring two goals in the tournament, including the match winner against Portugal in the round of 16.
Vidal made his senior debut in a friendly against Venezuela, where Chile won 1–0.
He contributed seven league goals and three assists, including crucial goals against Napoli and a double against Roma.
On 19 September 2012, Vidal scored his first UEFA Champions League goal in the group stage match away against the defending champions Chelsea.
After a good 2010–11 season, Vidal was linked with various clubs, including Bayer's Bundesliga rivals Bayern Munich.
He made his competitive debut in the opening league game of the season against Parma, coming on as a second-half substitute for Alessandro Del Piero; he marked his first appearance with a goal six minutes after his introduction in Juventus' 4–1 win.Vidal was born in San Joaquín, a working class commune in the Chilean capital Santiago.His potential was discovered by his uncle, and he later joined the youth squads of local Primera División club Colo-Colo.He helped the club to a runner-up finish in the Bundesliga and topped the assist charts for his club with 11 assists, which was joint second in the league.He also contributed two goals in the club's run to the round of 16 of the UEFA Europa League.The 2007 Apertura Tournament was Vidal's last with Colo-Colo as he left for Bayer Leverkusen in the summer.