Manchester City goalkeeper Joe Hart has warned against complacency for their Europa League second-leg clash with Porto.

The Blues lead 2-1 from the first leg, but the England No.1 reckons the Portuguese side will not give up their hold on the trophy lightly and expects a tricky return game.

"Porto are a very good side, but we left there happy - really, really happy - that we'd beaten them," Hart told City's website. "That's not because we felt they were better than us, but because it is a hard place to go and get an away lead.

"After working so hard to win in Portugal, we can't afford to waste it in the home leg. We need to play like we did over there and not think about just trying for a draw or a 1-0 win. If we play our normal game, I think we'll be OK."