A last-gasp goal from defender Jerome Boateng gave Bayern Munich a 1-0 win over Manchester City in their opening Champions League Group E clash.
Boateng broke the deadlock with a powerful shot after the Germans controlled the game, but failed to crack open a tight defence until the 90th minute.
But it is Roma who sit top of the group with a 5-1 thrashing of CSKA Moscow.
Elsewhere, an under-strength Barcelona got their Champions League campaign off to a solid if unspectacular start when a Gerard Pique header was enough for a 1-0 win at home to APOEL.
Barca predictably dominated their Cypriot visitors at the Nou Camp and after waves of attacks eventually found a breakthrough when Pique headed a Lionel Messi free kick into the bottom corner of the net in the 28th minute.
Meanwhile, Chelsea wasted chance after chance and had to settle for a 1-1 draw with Schalke 04 at Stamford Bridge.
Cesc Fabregas scored his first goal for Chelsea to put them ahead after 11 minutes.
But the London side, who have won all four Premier League games, were pegged back when Klaas-Jan Huntelaar scored a superb equaliser for Schalke who are without a win in Germany this season.
Bayern Munich 1-0 Man City
Roma 5-1 CSKA Moscow
Ajax 1-1 PSG
Barcelona 1-0 Apoel
Chelsea 1-1 FC Schalke 04
NK Maribor 1-1 Sporting
Ath Bilbao 0-0 Shakhtar Donetsk
FC Porto 6-0 BATE