Groups E-H are in action on Wednesday in Europe as eight games take place.
Roma are flying at home to CSKA, as are FC Porto vs. BATE Borisov, while Bayern Munich and Man City are deadlocked in Bavaria.
FOLLOW LIVE – Bayern vs. Man City
Below is an update from all eight games, as the big clubs are making their mark early on.
Bayern Munich 0-0 Man City
Joe Hart has kept City in it with three superb saves, as Bayern are knocking at the door. City holding on.
AS Roma 4-0 CSKA Moscow
Roma are flying as they went 4-0 up in the Italian capital Gervinho bagged two, while Iturbe and Maicon also scored. This could be double figures…
Ajax 0-1 Paris Saint-Germain
The French champions are ahead in Amsterdam thanks to Edinson Cavani’s opener. Can Ajax hit back?
Barcelona 1-0 APOEL Nicosia
Spanish defender Gerard Pique has Barca 1-0 up at home to Cypriot minnows APOEL. More goals expected in the second half.
Chelsea 1-0 Schalke 04
The Blues are ahead thanks to Cesc Fabregas’ opener after just 11 minutes. Since then they have controlled the game but Schalke are still in this one.
Maribor 0-0 Sporting Lisbon
Lisbon are being held in Slovenia, with both teams eager to jump ahead of Schalke early in the group stages.
Athletic Blibao 0-0 Shakhtar Donetsk
Not much to report from the San Mames as Atheltic make their long-awaited return to the Champions League group stage.
FC Porto 3-0 BATE Borisov
Yacine Brahimi has scored twice and Jackson Martinez added another as Porto are cruising at home to their Belarusian opponents.