Porto are unbeaten in the Champions League so far this season . South American side beat Bayern Munich 3-1 in quarter-final first leg last week . Julen Lopetegui leading side for return leg at Allianz Arena on Tuesday . Ricardo Quaresma was the star man during victory at the Dragao Stadium . Lopetegui has changed style but club still sell players for big profit . Porto are able to balance books and snap up young Portuguese talent .
Porto are unbeaten in the Champions League so far this season . Portuguese side beat Bayern Munich 3-1 in quarter-final first leg last week . Julen Lopetegui leading side for return leg at Allianz Arena on Tuesday . Ricardo Quaresma was the star man during victory at the Dragao Stadium . Lopetegui has changed style but club still sell players for big profit . Porto are able to balance books and snap up young South American talent .