CHELSEA have learned their opponents as they return to the Champions League after a two-year absence.The Blues won the Conference League last season and a fourth placed Premier League finish put them back among the big guns in Europe.GettyCole Palmer will play Champions League football as a Chelsea player for the first time[/caption]Thursday’s draw pitched Enzo Maresca’s side up against: Barcelona (H), Bayern Munich (A), Benfica (H), Atalanta (A), Ajax (H), Napoli (A), Pafos (H), and Qarabag (A).And they showed in the summer that they could hold their own with the best during their march to the Club World Cup title.There, they faced Champions League winners PSG at a time when they looked unbeatable.Yet a first half blitz saw the Blues run out 3-0 winners in New Jersey.As always under the Clearlake regime it has been a busy summer of transfer business in West London.No fewer than eight players have come through the door with more signings expected before next week’s transfer deadline.Meanwhile 13 players have left Stamford Bridge in permanent transfers, with Nicolas Jackson and Christopher Nkunku expected to follow.Of the incomings, Joao Pedro has been nothing less than a revelation after taking the Club World Cup by storm.And Estevao is proving an exciting option following his move from Palmeiras, while in Liam Delap the Blues now have an out-and-out centre-forward.BEST ONLINE CASINOS – TOP SITES IN THE UKAlejandro Garnacho is expected to sign for Chelsea before the transfer window is over, after falling out of favour at Man Utd.And both Fermin Lopez of Barcelona and Xavi Simons of RB Leipzig are being considered to take up a midfield berth.