Slavia Praha are coming off a draw with Fenerbahçe, their first good result in the competition, while Arsenal equalized with Bayern after two wins.
Match Replays
Porto have to get going quickly to have a shot, having had three missteps already. Napoli avoided falling into the same hole by outlasting Bodø/Glimt.
Lens quickly slowed down after a promising start, enduring back-to-back losses. Instead, Como put together a dazzling display against Man. United.
Viking and Sabah have had a tough time measuring up to the heavyweights but have logged one draw and one win, respectively, in the first three games.
RB Leipzig have upended PSV but suffered large defeats to Como and Real Madrid. Man. City have taken advantage of easier match-ups but fell to PSG.
PSV nabbed their first UCL victory by taking down Porto on the road, while Club Brugge have already pulled off two upsets, versus Inter and Lens.
Dortmund quickly atoned for a slip-up by topping Sabah and sit at six points, while Real Betis have swept their first three fixtures.
Fenerbahçe are still seeking their maiden win but have shared the spoils twice with Roma and Slavia Praha. Liverpool commenced with three triumphs.
AEK Athens had started with a victory over LASK but then took two tumbles. Real Madrid are part of the leading group, having picked up nine points.
Feyenoord sandwiched a strong result against Como between losses to Barcelona and Real Betis. Inter avoided disaster late versus Shakhtar Donetsk.
Bodø/Glimt have had a rough schedule, falling twice but also stunning Dortmund. Lille are one of the three teams still without a point.
Barcelona had their first stumble in the clash with PSG, while Aston Villa took advantage of fairly easy match-ups, sweeping their first three games.