2011, it was revealed that Touré had failed a drug test and had been suspended. The World Anti-Doping Agency imposed a 6-month suspension from football effective 2 March 2011. In the 2011–12 season, Touré was used as a squad player, making 14 league appearances as Manchester City won a league title for the first time in 44 years. Liverpool On 28 May 2013, Liverpool announced that an agreement had been reached in principle to sign Touré on a free transfer from Manchester City. On 2 July he was unveiled as Liverpool's first signing of the window and was handed the number 4 shirt. He signed a two-year contract. On 13 July 2013, he made his debut for Liverpool in a 4–0 win in a preseason friendly over Preston North End. He made his Premier League debut for Liverpool on 17 August 2013 in a 1–0 victory over Stoke City at Anfield. On 2 February 2014, in a match against West Bromwich Albion he made a costly mistake, passing the ball straight to Victor Anichebe, who scored an equaliser. On 12 February 2014, he scored an own-goal in a match against Fulham, which eventually Liverpool won thanks to a late penalty from skipper Steven Gerrard. On 1 March 2015, he came on as an 83rd-minute substitute against Manchester City, marking the first time he and his brother Yaya, who started the match for City, faced each other in a competitive match. Touré scored his first Liverpool goal on 14 February 2016, heading in Jordan Henderson's corner kick to confirm a 6–0 win away to bottom side Aston Villa. It was his first goal in any match since January 2011, and he celebrated wildly. At the end of the 2015–16 season, Touré was released. Celtic On 24 July 2016, Touré reunited with former manager Brendan Rodgers when he joined Celtic on a one-year contract. He made his debut on 3 August 2016, coming on as a substitute in the second half of Celtic's 2–1 win over FC Astana in a Champions League qualifier. He made 20 appearances as Celtic completed an unbeaten domestic season, winning a treble of League, Cup and League Cup. Touré was not offered a new playing contract at the end of the season. In September 2017, Touré announced his retirement and took up a coaching role with Celtic. International career Touré made his debut for Ivory Coast in