 Despite this, Guidetti signed a new three-year deal with Manchester City on 18 October 2012, keeping him at the Etihad Stadium until 2015.He finally returned to playing football on 14 January 2013 when he played in the first half of an Under 21 League match between City and Reading U21s, scoring the opening goal in a 3–1 win.Guidetti scored a further five goals in his next six games for the Development Side, before sucummbing to a knee injury which later required surgery.