Liverpool head to Old Trafford this weekend knowing their opponents are sweating over several key players ahead of what promises to be a crucial encounter in the Champions League qualification battle.

United interim head coach Michael Carrick delivered a mixed bag of injury updates on Friday, with question marks hanging over some important names in his squad. The Reds, sitting fourth and eight points clear of the Champions League qualification spots, will be eyeing any advantage they can get at their fiercest rivals' ground.

The most encouraging news for United comes with Matheus Cunha, who missed their victory over Brentford due to a hip problem. Carrick struck a cautiously optimistic tone about the Brazilian's chances of featuring against Liverpool.

"Matheus has done a little bit of work so we're hopeful. We're not sure, but we're hopeful," Carrick told reporters on Friday.

That uncertainty will be music to Liverpool ears. Cunha's pace and directness have caused problems for defences all season, and his absence would rob United of a key attacking outlet just when they need all hands on deck.

More concerning for United is the situation surrounding Luke Shaw. The England international was withdrawn during their win over Brentford last weekend, immediately raising alarm bells about another potential injury setback. Carrick's silence on Shaw's condition speaks volumes about the uncertainty surrounding the left-back's availability.

Shaw's fitness record has been patchy at best, and losing him for such a massive fixture would force Carrick into tactical compromises. Liverpool's right flank, where pace and precision have been hallmarks this season, could find themselves facing a makeshift solution if Shaw cannot recover in time.

The news gets worse for United when it comes to Matthijs de Ligt. The Dutch defender, who has been sidelined with a back injury since November, remains unavailable despite making progress in his recovery.

"Mata [De Ligt] still a bit further and not involved in the game," Carrick confirmed.

De Ligt's continued absence leaves United's defence looking thin against a Liverpool attack that has found its rhythm in recent weeks. The centre-back's aerial presence and organisational skills would have been invaluable against the Reds' varied attacking threats.

Then there's Lisandro Martinez, who remains suspended following his red card in last month's defeat to Leeds United. The Argentine will serve the final match of his three-game ban against Liverpool, ruling him out of what many consider the biggest fixture remaining in United's season.

Martinez's absence is particularly significant given his partnership with whoever lines up alongside him in central defence. His reading of the game and ability to step out with the ball have been crucial to United's better performances this campaign.

For Liverpool, these injury concerns represent an opportunity to capitalise on a United side potentially weakened in key areas. The Reds have dealt with their own fitness issues throughout the campaign, so they know better than most how disruptive missing players can be to team rhythm and tactical plans.

Carrick will need to find solutions quickly, with Old Trafford expecting nothing less than a performance that matches the occasion. The interim boss has shown tactical flexibility since taking charge, but injuries in multiple positions will test that adaptability to its limits.

The bigger picture remains Liverpool's push to cement their Champions League qualification. That eight-point cushion looks comfortable on paper, but football has a habit of making the comfortable uncomfortable very quickly. Every point matters in this final stretch, and facing a depleted United could be exactly the break the Reds need.

With question marks over key United players and Liverpool's own injury list finally clearing, Sunday's clash at Old Trafford could prove decisive in shaping both clubs' seasons.