Lisandro Martinez's injury is a nightmare come to life! Man Utd winners & losers from Europa League draw vs Sevilla as everything goes wrong late

How does a team in serious danger of being relegated from La Liga and on their third manager of the season fight their way back from two goals down in the space of seven minutes? By being the kings of the Europa League, that's how. Even in their worst season of the century, Sevilla were able to remind everyone why they have won the competition a record six times.

They had been outplayed and overpowered by Ten Hag's side yet stayed alive, and when they were given a lifeline by Malacia, they poured forward in search of an equaliser.

And looking at how they played in the final 10 minutes of the game, you cannot say they did not deserve it when Maguire headed into his own net from an unfortunate deflection.

Sevilla's much-loved modern club anthem boasts of the team's never-say-die attitude.

"They say they never give up. The art of their football has no rival and they have been fighting for 100 years, flying the flag for our city," crowed the Andalusian singer El Arrebato.

He wasn't wrong.

The defender looked utterly distraught as he was carried off the pitch by fellow Argentina internationals Gonzalo Montiel and Marcos Acuna after suffering a horror foot injury.

Ten Hag would not speculate about the injury but it looked as if it could be bad enough to rule him out for the rest of the season.

That would be a catastrophic blow for United.

"We have seen with Martinez, there was no opponent involved, so it doesn't look great," was all Ten Hag offered to BT Sport. "But we still have to wait and see."

Martinez has been one of the team's most consistent performers and a candidate for player of the season behind Marcus Rashford and Casemiro.

He is not just a no-nonsense, brave defender, but he is also an outstanding passer and many of United's best attacking moves begin with his pin-point passes from deep.

His injury also left United with 10 men for the final four minutes plus added time as Ten Hag had used his all substitutions. Sevilla took full advantage of those short numbers.

Martinez's injury was a final devastating blow on a night in which United lost Varane to a knock at the end of the first half and also saw Bruno Fernandes pick up a yellow card which rules him out of the second leg.

There is also the small matter of missing Marcus Rashford for the return fixture in Sevilla.

In the space of one month, Marcel Sabitzer has scored more goals (three) than all of Chelsea's January signings combined.

Is that a testament to the Blues' impotence? Of course. But it also illustrates what an influence the on-loan midfielder has had under Ten Hag. He's been one of the better under-the-radar additions in the Premier League, particularly given United's fitness problems.

With Rashford injured, the pre-match discussion was on whether Anthony Martial would pick up the mantle from the England forward or if Antony could finally unlock his potential.

Few people could have imagined that the man leading the line and doing the damage in attack would be Sabitzer.

The Austrian had been threatening to score in his last two outings against Brentford and Everton and stepped up to the plate in style, producing two assured finishes that Rashford would have been proud of.

Beyond his goals, Sabitzer ran the show in midfield and was conducting United's counter-attacks as they ran Sevilla ragged in the first half.

The 29-year-old has been steadily improving since joining on loan in January and has been slowly building a case for a permanent contract.

If he keeps performing like this, it will be difficult for United to resist making him an offer.

The Dutchman had a torrid night, even before his double whammy of errors which handed Sevilla the keys to their unlikely comeback.

Early in the game he was dispossessed by Lucas Ocampos in a dangerous area and was fortunate the Argentine overhit his cross into the box.

He looked a liability and then made an unforgiveable lapse when he tried to let the ball run out of play without looking whether to see if anyone was behind him.

He had not spotted the lurking Jesus Navas and was taken by surprise when the winger appeared, failing to block his cross and diverting it past De Gea.

Before Thursday's outing, Malacia could consider his first season a relative success even though he is clearly second choice behind Luke Shaw.

But this performance will keep him up at night for some time.

In his first start in three months, the Frenchman showed United what they have been missing.

Every time the oft-injured forward got on the ball he made an intelligent move, holding it up and allowing his team-mates to get forward before releasing them.

He played a sumptuous pass into the feet of Sabitzer for the second goal and linked up well with Antony, who was in electrifying form in the first half.

He showed that he is a class above Wout Weghorst.

It was understandable that Ten Hag took him off in the 62nd minute, given his propensity to succumb to muscle injuries.

And just imagine how much better a position United would be if he had stayed fit for the majority of this season.

It was unquestionably a dismal end to the night for the Red Devils but one of the few positives is that Martial is back.

If - and it's a big if - he can stay in shape for the rest of the campaign then United can still finish the campaign on a high, even given their long list of injuries.

The United manager was let down by the lapses from Malacia and Maguire but his over-cautious substitutions played a big part in their downfall.

He had no choice but to take off Varane but he took off Fernandes and Antony as they had yellow cards, in the fear that they could get sent off.

Antony in particular was having an excellent game and taking him off threw a life jacket to Sevilla, who were really struggling to deal with the Brazilian's pace and trickery.

And while Jadon Sancho was not having a great game, Anthony Elanga has not done anything of note all season and his addition also played into Sevilla's hands.

Ten Hag's eagerness to make all his changes by the 81st minute meant that the had no substitutions left when Martinez suffered his agonising injury.

Martinez's injury can be dismissed as a freak incident but Ten Hag had not accounted for any late mishaps and was punished as a result.

United could pay a big price for his game management next week.