Sergio Aguero Manchester City forward Sergio Aguero has been ruled out for a month following a hamstring injury that he suffered during the match against Tottenham Hotspur at White Hart Lane. The Argentinian international will miss the first leg of the Champions League last-16 crucial tie against Barcelona. However, he could be back before the second leg at Nou Camp. PELLEGRINI: ?Nasri continues treatment. Javi Garcia and Kun Aguero are injured. Doctor has seen Aguero and he will be out for a month.? — Manchester City FC (@MCFC) January 31, 2014