Raheem Sterling netted at both ends as Manchester City were made to fight for a 3-3 draw with Celtic in a Champions League thriller on Wednesday, while Atletico Madrid once again did for Bayern Munich.
While City’s perfect start to the season was ended in Glasgow, their Premier League rivals Arsenal eased to a 2-0 victory against Basel.
Atletico had eliminated Bayern in the semi-finals last season and repeated the trick at the Vicente Calderon to make it a double for Spanish clubs against German opposition as Barcelona downed Borussia Moenchengladbach, making a comeback after going down by a goal.
On paper, the Group C clash at Celtic Park appeared to be a bit of a mismatch with City looking to equal Tottenham Hotspur’s English record of 11 successive victories at the start of a campaign from 1960.
But instead Pep Guardiola’s men found themselves having to come from behind three times to claim a point at a raucous Parkhead, with Celtic first scoring in the third minute when an Erik Sviatchenko header went in off Moussa Dembele.
It is Barcelona who are top of the section after the Spanish champions followed their 7-0 trouncing of Celtic last time out with a come-from-behind 2-1 victory over Gladbach in Germany.
Five-time European champions Barca, who were without the injured Lionel Messi, can now look forward to a fascinating double-header with their old coach Guardiola’s City.
Meanwhile, Theo Walcott made the difference as Arsenal eased to three points against Basel at the Emirates Stadium.
They are level atop Group A alongside Paris Saint-Germain, who beat Ludogorets 3-1 in Bulgaria.
In Madrid, Atletico inflicted Carlo Ancelotti’s first defeat as coach of Bayern as Yannick Carrasco’s first-half strike separated the sides at the Vicente Calderon in Group D.
The Spaniards eliminated Bayern on away goals in the semi-finals of last season’s Champions League and there was to be no revenge for the five-time European champions, who would have lost by a wider margin had Antoine Griezmann not struck the bar with a late penalty.
Atletico have maximum points before a double-header with Rostov, who claimed their first ever point in the competition in a 2-2 draw with PSV Eindhoven in Russia.
In Group B, Napoli continued their excellent start to the season by beating Benfica 4-2 in Italy.
Also in Group B, Dynamo Kiev came back to draw 1-1 with Besiktas in Istanbul, substitute Viktor Tsygankov cancelling out Ricardo Quaresma’s opener.