Match facts
Head-to-head
This is the first Champions League meeting between Barcelona and Manchester United since the 2011 final, which Barcelona won 3-1 at Wembley.
Manchester United have never lost a home European match against Barcelona (W2 D2 L0), with this the first meeting between the sides at Old Trafford since the second leg of the 2007-08 Champions League semi-final, a 1-0 win for the Reds.
Manchester United
Manchester United have won two of their past 11 Champions League knockout ties (W2 D3 L6), failing to win either of their quarter-final games in the 2013-14 season under David Moyes against Bayern Munich.
Striker Romelu Lukaku scored with both of his shots in a 3-1 away win over PSG in the last 16 - he had failed to score with any of his previous eight shots in the Champions League this season. The Belgian has scored with his past three shots in the Champions League knockout stages.
Manchester United have lost two home Champions League matches this season, against Juventus and PSG. They've lost three in one season just once, during the 1996-97 campaign, with current boss Ole Gunnar Solskjaer featuring in all three defeats.
Barcelona
This is Barcelona's 17th Champions League quarter-final appearance, a joint-record with Bayern Munich; they have qualified for an 12th successive season, a competition record.
Barcelona have progressed from 79% of their Champions League knockout ties when playing the first leg away from home (23 of 29), compared with just 33% when playing the first leg at home (four of 12).
Since Chelsea eliminated Barcelona in the 2011-12 semi-final, English teams have been eliminated in 10 of 11 Champions League knockout ties against Spanish sides - the exception was Leicester City against Sevilla in the last 16 in 2016-17.
Barcelona's Lionel Messi has scored 22 Champions League goals in 30 appearances against English teams - more than any other player in the history of the competition.
Messi has failed to score in any of his past 11 Champions League quarter-final appearances for Barcelona; since netting against PSG in April 2013, the Argentine forward has attempted 49 shots without success at this stage of the competition.

Barcelona have only lost once in all competitions since 23 January and are 11 points clear at the top of La Liga.

Captain and forward Lionel Messi has scored 43 goals in 40 games this season, including 13 in his past nine appearances and eight in this season's Champions League - the joint-most alongside Bayern Munich striker Robert Lewandowski - while Luis Suarez is also expected to be a threat for the visitors.

"What kind of plan can you have to stop one of the best players in the world?" said Ole Gunnar Solskjaer, when asked how he will deal with the Argentine.

"We are looking forward to the opportunity but we have played Juventus with [Cristiano] Ronaldo, PSG with [Kylian] Mbappe, Chelsea with [Eden] Hazard.

"Suarez and Messi will keep our defenders on our toes."

The bad news for Manchester United is that Luis Suarez and Lionel Messi have both been producing heroics on a regular basis recently.

Between them, they have scored 14 goals in the last six games (10 for Messi, four for Suarez), with Messi taking his tally for the season to 43 goals in 40 games (he also has 17 assists).

Many observers believe this could so far be Messi's best season yet, and the only real justification for thinking he might be 'in decline' is if you haven't actually watched him play.

Luke Shaw's 12th Minute own goal gives Barca lead

57 mins
Post update
Man Utd 0-1 Barcelona

Still just the one shot on target all game. Not been a bad game, it's compelling, on the edge.

60 mins
Post update
Man Utd 0-1 Barcelona

Into the final half an hour. Manchester United have looked far better since the restart but are yet to really test Barca at the back, although Marcus Rashford has won a free-kick on the right-hand side.

Send the big lads up...

66 mins
GREAT SAVE!
Man Utd 0-1 Barcelona

Saved with his feet again! Barcelona are knocking on the door now, Lionel Messi heavily involved as they work the ball into the path of Jordi Alba on the left and his shot is well saved by David de Gea.

Messi then threads a pass into the path of the sub Sergi Roberto but Luke Shaw makes a fine challenge.