Answer
After four seasons at Bayer Leverkusen, Arturo Vidal moved to Juventus. Vidal had been a key player for Leverkusen, helping the team to reach the Champions League semi-finals in 2011-12. He was also named the Bundesliga Player of the Year in 2012. Vidal's move to Juventus was a major coup for the Italian club, as he was one of the most sought-after players in Europe at the time.