Manchester United conceded a dramatic stoppage-time goal as they lost to Young Boys 2-1 despite Cristiano Ronaldo scoring on his Champions League return for the Red Devils.
Ronaldo, who became the joint all-time Champions League appearance holder on his 177th appearance in the competition, fired United ahead after an exquisite pass from fellow Portuguese Bruno Fernandes.
United played for almost an hour with 10 men after Aaron Wan-Bissaka’s dangerous challenge on Christopher Martins earned the defender a straight red card.
They looked set to hang on for a point in an entertaining match after Cameroon winger Moumi Ngamaleu’s equaliser.
But a 95th-minute mistake by substitute Jesse Lingard – who had replaced Ronaldo with 18 minutes left – allowed Jordan Siebatcheu to score the winner for the team that had to come through qualifying to reach the group stage.
The home fans celebrated wildly while Ole Gunnar Solskjaer was left to reflect on a performance which saw United muster just two shots, the fewest Opta have on record in any of their 138 Champions League matches since 2003-04.
Having missed out on qualifying for the knockout stages of the competition last season, United now host Villarreal in their next Group F game on 29 September in a repeat of last season’s Europa League final.
Chelsea opened their defence of the Champions League with a 1-0 victory as Romelu Lukaku finally pierced Zenit St Petersburg’s stubborn resistance at Stamford Bridge.
Lukaku, a £97.5m summer signing from Inter Milan, has already demonstrated his goal threat in the Premier League and was on the mark again with his first goal for Chelsea in the competition they won for the second time against Manchester City in June.
Chelsea were made to work hard as Zenit dug in but manager Thomas Tuchel’s side stepped up the pace after the interval, Lukaku breaking the deadlock when he headed in at the far post from Cesar Azpilicueta’s cross in the 69th minute.
The holders deserved the victory but Zenit missed a glorious chance to snatch a point when substitute Artem Dzyuba slid wide from six yards as he tried to turn in Sardar Azmoun’s cross late on.
Meanwhile, goals from Thomas Muller and Robert Lewandowski settled a battle of the big two in Champions League Group E as Bayern Munich claimed a dominant opening-game 3-0 victory at Barcelona.
The German champions controlled the game, with Muller scoring his seventh career goal against Barca courtesy of a first-half effort that found the net off Eric Garcia’s back.
Lewandowski made sure of the win with a typical predatory finish, poking his 74th Champions League goal into an empty net after Jamal Musiala’s drive had cannoned back off the post.
His 75th came late in the game, as he once again showed his talent in front of goal with a lashed finish after Serge Gnabry’s shot had come back off the post and fell to him in the box.
Barca, playing their first Champions League since the departure of talisman Lionel Messi, were flat and offered little, failing to muster a single shot on target.
The Catalan side have now lost three consecutive home games in European competition for the first time in their entire history.
They ended the game with four teenagers on the pitch, which did at least inject some urgency and lift a subdued crowd of just short of 40,000 because of Covid-19 restrictions.
But they were still thoroughly outclassed and by a Bayern team that were not even at their best.
The German side lead the group, with the other game, between Benfica and Dinamo Kiev, finishing 0-0.
Other scores: Sevilla 1, RB Salzburg 1; Villarreal 2, Atalanta 2; Lille 0, Wolfsburg 0; Malmo FF, Juventus 3. (BBC)