Manchester City's Erling Haaland came back to haunt Borussia Dortmund with a clinical finish against his former team, while Phil Foden bagged a brilliant brace as the hosts cruised to a 4-1 win in the Champions League on Wednesday to climb to fourth.
Rashford, one of Europe's top talents before falling out of favour at United and spending the latter part of last season on loan at Aston Villa, joins a stellar attacking cast featuring Robert Lewandowski, Raphinha, Dani Olmo and Ferran Torres.
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The Dutchman burst through the middle of the pitch and laid the ball off for Messi to dribble into the net for an 18th league goal of the season, extending his lead at the top of the scoring charts.
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Messi brace leads Barca to within four points of La Liga summit
Lionel Messi scored twice as King's Cup holders Barcelona moved comfortably into the quarter-finals by thrashing Celta Vigo 5-0 at the Nou Camp in their last 16 second leg game on Thursday.
Lionel Messi came off the bench and scored twice in the second half as Barcelona, who survived two late dismissals, won 2-1 at Racing Santander on Sunday and maintained their huge lead in the Primera Liga. Racing gave the visitors little space and took the lead after the restart when Nikola Zigic scored from the penalty spot.
Barcelona goalkeeper Victor Valdes conjured two stunning saves to deny Atletico Madrid and help the La Liga champions secure a fourth Spanish Super Cup in five years on away goals after a scrappy 0-0 second leg draw at the Nou Camp on Wednesday.
Thierry Henry and Zlatan Ibrahimovic scored in the second half as Barcelona squeezed past bottom club Xerez 2-0 to go five points clear at the top of La Liga on Wednesday.
Two goals from Lionel Messi and a poacher's strike from Bojan Krkic gave Barcelona a 3-0 win over Athletic Bilbao in their Spanish Super Cup second leg on Sunday for a 5-1 aggregate victory.
Barcelona's Neymar scored twice and Luis Suarez was also on target as they reached their fourth King's Cup final in five years with a 3-1 win away to Villarreal on Wednesday that gave them a 6-2 aggregate victory.
Primera Liga top scorer Samuel Eto'o netted twice as Barcelona beat Sporting Gijon 3-1 at the Nou Camp on Sunday to restore their 12-point advantage at the top of the table.
Thierry Henry scored a hat-trick as Barcelona crushed Valencia 4-0 at the Nou Camp to move six points clear at the top of the Primera Liga on Saturday.
La Liga champions Barcelona began the new campaign with a 3-0 win over Alaves on Saturday with the help of a spectacular under-the-wall free kick from Lionel Messi, who scored twice, and a curling shot from substitute Philippe Coutinho.
Lionel Messi scored two late goals on Saturday as leaders Barcelona won 3-0 away to Hercules, their 15th consecutive victory matching the La Liga record set by Real Madrid in the 1960-61 season.
Lionel Messi's stunning hat-trick set a Barcelona scoring record of 234 goals as the La Liga champions won an action-packed home game against Granada 5-3 to close within five points of La Liga leaders Real Madrid on Tuesday.
Lionel Messi proved too hot to handle for Real Zaragoza as he inspired Barcelona to a 4-1 home victory with two goals in the Primera Liga.
Cesc Fabregas and Alexis Sanchez were on scintillating form as leaders Barcelona made light of the absence of injured World Player of the Year Lionel Messi with a 5-0 win at home to Real Mallorca in La Liga on Saturday.
The unstoppable Lionel Messi set a record for goals scored in a calendar year and kept unbeaten La Liga leaders Barcelona six points clear of Atletico Madrid in a nervy 2-1 win at Real Betis on Sunday.
Lionel Messi's seemingly endless love affair with the Champions League continued with another virtuoso two-goal performance on Wednesday for Barcelona.
Barcelona's Xavi crashed a shot into the top corner three minutes from the end and Lionel Messi forced a stoppage-time own goal as the hosts overcame stubborn Granada 2-0 to maintain their perfect La Liga start on Saturday.
Tensions have flared in the region of Barcelona due to the controversial court decision jailing several leaders of the Catalan independence movement for their role in organising a referendum on the subject in 2017.
Barca lead the standings on 39 points from 18 games, three clear of second-placed Real Madrid who host Athletic Bilbao on Sunday.
Real Madrid's stuttering start to La Liga continued when they lost 1-0 at Sevilla to slip eight points behind leaders Barcelona who were 4-1 victors at Getafe earlier on Saturday.
Barcelona's Lionel Messi was named as Argentina's sports personality of the year on Wednesday, winning the Olimpia de Oro (gold) for the first time.
Real Madrid forward Cristiano Ronaldo repeated allegations that referees favour Barcelona after his side were eliminated from the Champions League by their bitter rivals in the semi-finals on Tuesday.
News of all that's transpired on and off the football field.
Coutinho, who arrived from Liverpool for a club record 165 million euros ($185.18 million) in January 2018, has so far shown little to suggest he will be able to compensate for Frenchman Ousmane Dembele's absence against Lyon in the UEFA Champions League tie.
Luis Suarez has received a second European Golden Shoe of his career after becoming the leading scorer in Europe's top domestic leagues last season.
Third tier Poli Ejido came from behind to clinch a 3-2 win at home to Espanyol in their King's Cup last-16 first leg on Wednesday.
Barcelona continued their rampant run of domestic form to beat Osasuna 2-0 away from home on Saturday and move to within two points of La Liga leaders Atletico Madrid, with Lionel Messi setting up goals scored by Jordi Alba and teenager Ilaix Moriba.
Valencia have agreed to sign Mali midfielder Seydou Keita on a contract until the end of June with an option for one more season, the La Liga club said on Wednesday.
Barcelona coach Tito Vilanova is to step down due to ill health, Spanish media reported on Friday, without identifying the source of their information.
Luis Suarez grabbed a hat-trick and Lionel Messi bagged two goals as Barcelona began their quest for a third straight La Liga title with a 6-2 rout of Real Betis on Saturday. Arda Turan, whose two goals against Sevilla helped Barca lift the Spanish Super Cup on Wednesday, gave them an early lead at the Nou Camp before Ruben Castro equalised in the 21st minute. Barca went back in front thanks to a trademark 37th-minute goal from Messi before Suarez, La Liga's top scorer last season, made it 3-1 before halftime.
The centre-back was at the Madrid Open earlier this week, reportedly to discuss a 16-team knockout tournament with ATP Tour chief Chris Kermode. It would potentially replace the former World Team Cup event on the ATP calendar that was played from 1975 to 2012 ahead of Roland Garros.
After picking fifth Ballon d'Or, Ronaldo's reignites eternal debate
'Barcelona are super favourites for this game and tomorrow everyone is already convinced that we have to be totally focused as a whole squad'
Cristiano Ronaldo shrugged off the boos of his own supporters to fire Real Madrid to a 3-0 win over Real Sociedad on Sunday.
Factbox on Barcelona and Argentina forward Lionel Messi, who became his country's all-time top goalscorer on Tuesday when he scored his 55th international goal.