Grimsby 2-2 Manchester United (Pens: 12-11) - Bryan Mbeumo misses key penalty as United crash out of Carabao Cup

Manchester United remain without a win this season after crashing out of the Carabao Cup at Grimsby Town in a huge giant-killing upset, despite the visitors hitting back from 2-0 down to force a penalty shoot-out at a saturated Blundell Park.

The League Two side last faced United in a competitive match in 1948, but did not look out of place against the Premier League visitors in the second-round clash with Charles Vernam (22') and Tyrell Warren (30') giving them a merited 2-0 half-time lead.

Under-pressure United manager Ruben Amorim made a triple change at the break with Matthijs de Ligt, Bruno Fernandes and Bryan Mbeumo introduced in torrential rain as they tried to avoid an early exit, and it was the former Brentford forward Mbeumo who gave them hope with a deflected finish on 75 minutes.

With the clock ticking down and Grimsby clearly tiring, Harry Maguire popped up to force the header into the net on 89 minutes from a Mason Mount corner, as the match headed for the drama of a penalty shoot-out.

And United had the chance to win it 5-4 on spot kicks after Andre Onana, who was badly at fault after missing a cross when Warren scored his side's second, halted Clarke Oduor's penalty with the help of the crossbar.

But home goalkeeper Christy Pym saved from Matheus Cunha's poor effort before fellow new United arrival Mbeumo then hit the bar trailing 12-11 after slotting his first spotkick.

It was probably a justified victory for The Mariners, who could have been 3-0 ahead with replays suggesting Cameron Gardner was onside after seeing a goal disallowed on 70 minutes.

While Grimsby enjoyed wild celebrations with their fans on the pitch, the third-round draw has handed them a trip to Championship side Sheffield Wednesday.

Meanwhile, United host Burnley on Saturday aiming for a first victory in the Premier League after a 1-0 defeat to Arsenal and a 1-1 draw at Fulham in their opening two league fixtures.

Bryan Mbeumo hits the bar and that is the victory for the League Two side. Wild celebrations. It is a huge giant-killing act! They win 12-11 on pens after a 2-2 draw. Truly astonishing.

Pym steps up to convert for the home side.

Evan Khouri squeezes home the next pen to give his side lead.

McJannett gives the home side the lead..incredible..

Cunha tried to place home the finish, but Pym guesses right. And the Mariners remain alive.

Henry Brown keeps the home side alive with a neat low finish.

Pym dived low to his right and Dalot planted the ball right. United on the brink of victory.