Manchester United dressing room showed what they think about Erik ten Hag against Liverpool

The magic of the FA Cup is alive and well, and don't Manchester United just know it.

United welcomed fierce rivals Liverpool to Old Trafford in the quarter-finals of the FA Cup on Sunday and the game was the perfect advert for England's oldest cup competition.

Scott McTominay's goal within 10 minutes gave United the dream start, but Liverpool responded by creating plenty of their own chances and it always felt like another goal was needed to prevent the visiting side from getting back into the game before half-time.

ALSO READ: United confirm their stance on Marcus Rashford's future

ALSO READ: Exclusive interview with Alexander Buttner

That goal almost came after an outstanding run from Kobbie Mainoo, who danced his way down the left. Marcus Rashford pulled it back to McTominay but he couldn't score his brace.

That was a pivotal moment and the warning sign, if United needed one, was Wataru Endo's offside goal. It looked to be onside from the press box but the goal was disallowed.

Liverpool were slicing through United's midfield like a hot knife through butter when they broke on the counter-attack and that pressure eventually paid dividends before the interval.

Jarell Quansah was allowed to burst down the right and Alexis Mac Allister beat Andre Onana at his front post, with the ball deflecting off the thigh of Kobbie Mainoo.

United conceded again moments later and went into the interval trailing 2-1 and although that felt cruel, Liverpool had created enough chances to score twice.

Jurgen Klopp's side had recorded 10 shots at the break and six of those were on target. United have conceded 20 or more shots in four of their last five league games and they were far too open again, with a space big enough to park a bus