Manchester City striker Sergio Aguero admits that things are looking grim for his side following their shock defeat to Southampton on Saturday.

City were trailing leaders Manchester United by nine points going into their game with the Saints, but ended up chasing their opponents throughout - with Edin Dzeko scoring City's only goal in their 3-1 loss.

A host of defensive mistakes cost the Citizens, with Joe Hart fumbling a shot through his legs while Gareth Barry passed the ball into his own net in the second-half.

Aguero admits that nothing went right for them against Southampton, but has refused to throw in the towel in regards to the title race.

"Some days, nothing works the way it should," he wrote on Twitter.

"[The Southampton defeat] was one of those days. There's no excuse - we need to work hard to forge ahead.

"It all looks a bit grim right now, but I won't believe giving up is an option."

Aguero himself has failed to reach the heights he did last season - where he scored 23 goals, including the last-gasp strike which secured them the title - as he has only netted nine times this term.