On 8 April, Agüero scored a solo goal to give City the win in the Manchester derby in the 78th minute, seven minutes after coming on as a substitute for Samir Nasri. Agüero then scored a header to help Manchester City defeat Chelsea on 14 April in the FA Cup semi-final and reach the final. In the 82nd-minute of the tie, Agüero made a two-footed tackle on David Luiz after the defender had previously appeared to tackle him. Despite the incident warranting a red card at the time, the FA announced Agüero would not be punished following confirmation that referee Chris Foy had at least seen part of the incident and acted on it during the match. Many people disagreed with this decision and felt that the FA had failed to act. On 17 April, Agüero revealed that he had apologised to David Luiz for his rash challenge on the defender. Agüero withdrew as a precaution at half-time on 17 April in Manchester City's 1–0 home victory over Wigan after feeling tightness in a hamstring, but he appeared as an unused substitute in City's 3–1 away loss at White Hart Lane against Tottenham on 21 April. He scored his next goal on 27 April, where he scored the opening goal, as Manchester City won 2–1 home against West Ham United. On 11 May, Agüero started for Manchester City in the 2013 FA Cup Final, where the team lost 1–0 to Wigan. Agüero scored his final goal of the season in a 2–0 away win against Reading on 14 May.