Champions League round-up: Arsenal beat Bayern Munich, Kylian Mbappe's four-goal bonanza, Liverpool thrashed 4-1

Arsenal beat Bayern Munich (Reuters Photo)

Arsenal beat Bayern Munich for the first time in a decade to maintain their 100 percent record in this season's Champions League with a 3-1 home win sending Mikel Arteta's side clear at the top of the group on Wednesday.

Jurrien Timber headed Arsenal in front from a corner after 22 minutes only for teenager Lennart Karl to equalise for the six-time European champions before halftime.

Arsenal dominated the second half though and displayed their enviable squad depth as substitutes Noni Madueke and Gabriel Martinelli scored the goals to make it five wins from five.

Real Madrid rally from behind

Real Madrid striker Kylian Mbappe scored four goals, including the second fastest hat-trick in Champions League history, to earn them a 4-3 comeback victory over hosts Olympiacos on Wednesday.

Mbappe's first three goals came in a spell of six minutes and 42 seconds in the first half but it was a tough encounter for the Spaniards before they earned their first victory at Olympiacos on their fifth attempt, and ended a three-game run across all competitions without a win.

Real moved up to fifth place in the standings on 12 points, with the top eight earning automatic qualification for the knockout stage and with three matchdays remaining. Olympiacos dropped to 33rd on two points.

PSV Eindhoven stun Liverpool

Liverpool's miserable season hit another low on Wednesday when they slumped to a 4-1 defeat to PSV Eindhoven in the Champions League, their first loss in their last 14 games at Anfield in the group stage of Europe's elite competition.

Couhaib Driouech bagged a double, while Ivan Perisic -- from the penalty spot -- and Guus Til also scored to leave PSV 15th in the Champions League table with eight points. Liverpool, who have lost nine of their last 12 games across all competitions, dropped to 13th on nine points.

Atletico beat Inter

Jose Maria Gimenez rose highest to head home a dramatic winner in added time, securing Atletico Madrid a stirring 2-1 victory over Inter Milan in a thrilling Champions League clash on Wednesday at the Metropolitano Stadium.

With the match poised at 1-1 after Piotr Zielinski had levelled for the visitors following Julian Alvarez's early goal, Gimenez leapt above Inter's defenders in the 93rd minute to nod Antoine Griezmann's precise corner into the net, sending the home crowd into raptures on a chilly night in the Spanish capital.

PSG come from behind to beat Spurs

Holders Paris St Germain showed a never-say-die attitude as they twice came from behind to beat Tottenham Hotspur 5-3 in the Champions League on Wednesday, with two moments of brilliance from Vitinha steering Luis Enrique’s side to victory.