There were some shocking UEFA Champions League scores in matchday 2 of this year's group stage.
Manchester United crashed to a 3-2 defeat to Galatasaray in the Champions League at Old Trafford as their alarming form under Erik ten Hag continued.
Rasmus Hojlund had twice given United the lead but the Turkish team pegged them back each time before Andre Onana's error led to Casemiro being red carded in his attempt to salvage the situation. Mauro Icardi missed the penalty but made amends with the winner.
Questions will be asked of Onana, uncertain throughout, but much of the defence were culpable for the capitulation. Having lost to Bayern Munich in their opening Champions League game, there is much work to do to progress beyond the group stage now.
Ten Hag's concerns are more immediate given that United have now lost six of their 10 matches this season.
Real Madrid came from behind to secure a 3-2 victory over Napoli in an entertaining Champions League encounter at Stadio Diego Armando Maradona this evening.
An opening goal by Vinicius Junior, followed by a moment of Jude Bellingham brilliance and a Federico Valverde long-range effort, kept Madrid's perfect record in the competition intact.
Napoli fought hard to secure a 2-1 win over Braga in their first Champions League outing of the season and were bidding to earn their first win over Real Madrid in four previous meetings in this competition, but it was not to be.
After sneaking a last-gasp win over Union Berlin in week one of this year's Champions League group stages, Carlo Ancelotti returned to the stadium where he was manager until 2019, this time in the opposing dugout.
Arsenal were beaten for the first time this season as Lens completed a comeback win in the French side's first Champions League home game in 20 years.
The Gunners, who were unbeaten in their previous 11 games, took the lead in northern France when Gabriel Jesus steered home a fine early finish – but they were pegged back by Adrien Thomasson's equaliser after David Raya's poor pass.
Arsenal were then given a major injury scare when Bukayo Saka limped off just five days before a mouthwatering Premier League clash with Manchester City this Sunday, live on Sky Sports.
The Gunners looked off-colour and were made to pay when Sepe Wahi steered home the winner for Lens with just over 20 minutes to go.
Kai Havertz, Leandro Trossard, Reiss Nelson and Emile Smith Rowe came close for Arsenal, provoking manager Mikel Arteta to say the game was lost in both boxes.
FC Bayern beat Copenhagen 2-1 on Tuesday night to consolidate their lead in Champions League Group A. After an uneventful first half, Lukas Lerager handed the home side the lead, but Jamal Musiala and sub Mathys Tel overturned the deficit to seal a deserved victory.
The win means Munich set a new record for the most consecutive away games without defeat in Champions League group stages at 18.
The Bavarians started with Sven Ulreich in goal and Noussair Mazraoui, Dayot Upamecano, Minjae Kim and Alphonso Davies in defense. Konrad Laimer and Joshua Kimmich anchored a midfield featuring Leroy Sané, Musiala and Kingsley Coman, with Harry Kane up front. Thomas Müller, Tel, Leon Goretzka and Eric Maxim Choupo-Moting took over from Laimer, Sané, Musiala and Coman late in the second half.
Mikel Oyarzabal and Brais Mendez scored first-half goals to give Real Sociedad a comfortable 2-0 win at Salzburg in their Champions League Group D clash on Tuesday.
The Basque side dominated proceedings from the get-go and opened the scoring in the seventh minute when captain Oyarzabal slotted a left-footed strike from the edge of the box into the far corner.
Mendez extended their lead 20 minutes later beating the goalkeeper with a tidy finish after a quick counter-attack.
Oyarzabal missed a sitter two minutes later and Salzburg complained vociferously to the referee after they had a penalty award overturned following a lengthy VAR review early in the second half.
Real Sociedad are top of Group D on four points from two games, one ahead Salzburg in second. Inter Milan, who are third on one point, host Benfica, who have no points, later on Tuesday.