Manchester City striker Sergio Aguero is set for a month out with a hamstring injury suffered on international duty.

The 27-year-old, who scored five goals in City's win against Newcastle last weekend, lasted just 22 minutes of Argentina's defeat to Ecuador.

"I think I'll be a month without playing," Aguero told TyC Sports in Buenos Aires.

City's problems increased on Friday as David Silva came off in Spain's 4-0 win over Luxembourg with a sprained ankle.

The 29-year-old midfielder hobbled off early in the first half as a result of a challenge by midfielder Lars Gerson. Spain manager Vicente del Bosque said he had no timeline on a return for Silva.

Aguero could miss four Premier League games - including the first Manchester derby of the season on 25 October - and two Champions League fixtures against Sevilla.

His absence leaves City with just Wilfried Bony as a recognised central striker, with youngster Kelechi Iheanacho in reserve.

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