Manchester City's Sergio Aguero celebrates scoring his side's second goal of the game during the Emirates FA Cup quarter final at the Riverside Stadium, Middlesbrough. (Photo by Mike Egerton/PA Images via Getty Images)

Manchester City's Sergio Aguero celebrates scoring his side's second goal of the game during the Emirates FA Cup quarter final at the Riverside Stadium, Middlesbrough. (Photo by Mike Egerton/PA Images via Getty Images)