Holders Real Madrid have been held to a 1-1 draw at home in the Champions League by Tottenham Hotspur while Manchester City showed their credentials by downing Serie A leaders Napoli 2-1.
Spurs opened the scoring through Raphael Varane's 28th minute own goal at the Bernabeu but Cristiano Ronaldo's penalty, his 110th goal in the competition, levelled the scores just before the break.
Ronaldo, who went third in the tournament's all-time appearance list with 143, and Karim Benzema were denied by Spurs' keeper Hugo Lloris but Keylor Navas kept out Harry Kane and Christian Eriksen.
In Group F, Manchester City stormed ahead against Napoli through Raheem Sterling and Gabriel Jesus before the visitors missed a penalty through Dries Mertens.
Amadou Diawara converted a late spot-kick for Napoli who could not find a leveller.
Liverpool embarrassed Maribor 7-0 in Slovenia, to equal the biggest away win in the competition, with Roberto Firmino and Mohamed Salah netting doubles in the Group E drubbing.
Australian goalkeeper Brad Jones was on the losing side as Feyenoord suffered a 2-1 home defeat to Shakhtar Donetsk.
Elsewhere, Spartak Moscow hammered visitors Sevilla 5-1 Besiktas became the first Turkish team to start a group campaign with three wins after a 2-1 victory at Monaco while RB Leipzig accounted for FC Porto 3-2.
Apoel Nicosia drew 1-1 with Borussia Dortmund in the other Group H game.
DPA
