Alexander-Arnold, seeing the Spanish club's defenders still getting organised, feigned to walk away from the corner before racing back to whip the ball to the unmarked Divock Origi, who clipped it past Marc-Andre ter Stegen.
Lionel Messi celebrated his sixth Ballon D'Or award with a brilliant hat-trick as Barcelona moved back top of La Liga with an emphatic 5-2 victory over Real Mallorca.
Real Madrid beat Barcelona 2-1 in the first Clasico of the season in front of 86,422 fans at the Camp Nou on Sunday after a sensational strike from defender David Alaba and a late goal from Lucas Vazquez gave Carlo Ancelotti's side three points.
Barca, chasing a third consecutive Spanish title, are on 76 points after 35 games while Real Madrid are top with 77 and can restore their four-point advantage when they host Alaves on Friday.
Lionel Messi scored his 12th league goal of the season but Barcelona had to rely on exceptional saves from Marc-Andre ter Stegen as they rode their luck to win 2-0 at Athletic Bilbao on Saturday and stay four points clear at the top of La Liga.
Barcelona reached the Champions League quarter-finals for the first time in four years
Five-times European champions Barca, with their trident of Lionel Messi, Luis Suarez and Neymar subdued, have not exited in the last 16 since going out to Liverpool in the 2006/07 season and the score equalled their worst Champions league loss.
Barcelona gave up more ground to Real Madrid in La Liga's title race on Tuesday after being held to a 2-2 draw at home to third-placed Atletico Madrid as a late penalty from Saul Niguez cancelled out Lionel Messi's 700th career goal. The draw meant the Catalans stayed second in the standings on 70 points and leaders Real Madrid, who have 71, will go four points clear at the top with five games left if they beat Getafe at home on Thursday.
As England tightened their grip on Euro 2024 qualifying and France maintained their perfect run, hosts Germany's troubles deepened.
Zinedine Zidane's side joined Atletico Madrid on 66 points and moved top of the table
A dramatic game featured missed chances, defensive howlers, scuffles and two video reviews, one producing a highly controversial outcome in the second half.
La Liga champions Barcelona fell to their first defeat in three games under new coach Quique Setien as they were beaten 2-0 away at Valencia on Saturday. Barca are still top of the standings on 43 points after 21 games but second-placed Real Madrid, who are also on 43, can go three points clear at the summit if they beat Real Valladolid away from home on Sunday.
Barcelona lifted the Spanish Super Cup for a record extending 13th time by coming from behind to beat Sevilla 2-1 on Sunday thanks to a stunning strike from France winger Ousmane Dembele and a penalty save in stoppage time from Marc-Andre ter Stegen.
Real Madrid moved back to the top of La Liga as Vinicius Junior scored both goals in a 2-1 victory at Elche on Saturday.
Antoine Griezmann scored two goals and provided two assists as Barcelona staged a stunning last-gasp comeback before beating Granada 5-3
Atletico celebrate anniversary with 3-1 comeback win over Mallorca
Barcelona goalkeeper Claudio Bravo injured his calf in their 2-0 victory at Real Betis in La Liga on Saturday, making him a doubt for the final two games of their title challenge.
Barcelona will travel to Borussia Moenchengladbach for their Champions League match on Wednesday without Lionel Messi but the Spaniards have enough options and firepower to plug the gap left by the Argentine, coach Luis Enrique said.
Barcelona coach Luis Enrique is expecting another gruelling game at Athletic Bilbao when the La Liga champions visit San Mames on Sunday.
A round-up of Wednesday's UEFA Champions League last-16 first leg matches.
Paulo Dybala upstaged his fellow Argentine Lionel Messi by scoring two exquisitely taken goals to set Juventus on the way to an emphatic 3-0 win over an underwhelming Barcelona in the Champions League on Tuesday.
Lionel Messi lifted Barcelona out of their recent slump with two goals in a vintage display as his side survived a tenacious Tottenham Hotspur fightback to claim a 4-2 victory in Champions League Group B on Wednesday.
IMAGES from the Champions League matches played on Tuesday.
Juventus forward Cristiano Ronaldo and Barcelona's Lionel Messi, who have won the award 10 times between them, are included
It was Messi's 30th goal in 39 competitive games against Atletico
Robert Lewandowski's brace earned depleted Barcelona a 2-1 comeback win at Valencia
Kylian Mbappe scored twice in the second half to help his side to a 4-1 comeback win at 10-man Barcelona
Barcelona's Joao Felix scored in the first half to secure a hard-fought 1-0 home win against his valiant parent club Atletico Madrid in a compelling LaLiga clash on Sunday.
The victory takes Barcelona up to fourth with 10 points after six games, one point behind surprise leaders Granada, Athletic Bilbao, who visit Leganes on Wednesday, and Real Madrid ahead of their game at home to Osasuna the same night.
Barcelona were crowned Spanish Super Cup champions after goals from Gavi, Robert Lewandowski and Pedri earned them a 3-1 win over bitter rivals Real Madrid in Saudi Arabia on Sunday.
Liverpool analysts had watched how Barcelona players were always distracted when decisions went against them and word was passed down to Carl Lancaster, a coaching mentor at the club's academy, who asked the ball boys to serve their players quickly.
Neto will sign a four-year deal with Barcelona that will keep him at the club until the end of the 2022-23 season and he will replace Dutch goalkeeper Jasper Cillessen who moved the other way on Wednesday.
A summary of Friday's action in the UEFA Nations League.
Barcelona will look to take a big step towards their first La Liga title in four years, when they take on Real Madrid this weekend.
Barcelona were in danger of being toppled from the top of La Liga standings on Sunday after they suffered a shock 2-1 defeat at Deportivo La Coruna.
Messi brace leads Barca to within four points of La Liga summit
A dominant yet wasteful Real ravaged their rivals in the first half while spurning a string of clear chances at the Santiago Bernabeu.
Robert Lewandowski and substitute Pablo Torre each scored twice to help leaders Barcelona thrash visitors Sevilla 5-1 in LaLiga on Sunday in a confidence boost for Hansi Flick's side ahead of key clashes against Bayern Munich and Real Madrid.
Barcelona's poor run away to Real Sociedad continued when the champions were held to a 1-1 draw at Anoeta on Sunday and slipped six points behind La Liga leaders Real Madrid before next week's 'Clasico' against their arch rivals.