We'll have to be at our very best to beat Chelsea says Porto boss Lopetegui
Porto boss Julen Lopetegui says his side must be at their very best against Chelsea in tonight's Champions League Group G clash.
The Premier League champions have made an inconsistent start to the season and drew 2-2 at Newcastle on Saturday to sit 15th in the table after just two wins in their first seven games.
But their opening 4-0 Group G victory over Maccabi Tel-Aviv shows Lopetegui of the danger posed by Jose Mourinho's side on the Blues boss' return to Estadio do Dragao.
"They won their first European game 4-0 and are a strong team, one of the biggest in the world," he said.
"We'll have to put in the perfect game to beat them."
Chelsea have been so inconsistent of late it is difficult to tell which side will turn up, but Porto are taking nothing for granted.
"We want to put in a great performance tomorrow, even against a team of Chelsea's power," added Lopetegui, whose side drew 2-2 in their opening game with Dynamo Kiev.
There are numerous sub-plots to the encounter.
Lopetegui has shared history with Mourinho. They were briefly at Barcelona at the same time, while the former goalkeeper also had a spell at Real Madrid prior to Mourinho joining the Spanish giants in 2010.