FC Porto manager Julen Lopetegui has stated that his team will have to play to their best in order to see off English champions Chelsea.

Chelsea have clearly endured a terrible start to their campaign and many feel that the Blues' struggles might continue when they travel to Portugal to square off against Porto in a tough Champions League encounter in midweek.

Despite Chelsea's current woes though, Porto boss Lopetegui is not taking the game lightly and insists that his side will have to play to their best in order to claim a victory on the night.

The Spanish manager said: "Mr Mourinho is a wonderful coach and did great things at Porto, winning trophies and I will respect that.

"We will have to put in the perfect game to beat them. They won their first European game 4-0 and are a strong team, one of the biggest in the world."