Despair for United and delight for Spurs at Old Trafford on Sunday.
Man United defender Luke Shaw believes they "were too quiet and naive" in their Premier League loss to Spurs on Sunday.
Left-back Luke Shaw said he and his Manchester United teammates 'need to look in the mirror' and realise they have let themselves and a lot of people down following their abysmal display against Tottenham Hotspur in the Premier League on Sunday.
Jose Mourinho's Lilywhites sealed a 6-1 win against United at Old Trafford, thanks to braces from Harry Kane and Heung-min Son as well as goals from Tanguy Ndombele and Serge Aurier following Bruno Fernandes' opener from the penalty spot early in the game.
Anthony Martial also saw a red for his reaction towards Erik Lamela, who provoked the Frenchman with his elbow, a situation that added salt to injury as Ole Gunnar Solskjaer's Red Devils struggled to keep up throughout the match.
Speaking to Sky Sports, England left-back Shaw said he was embarrassed on the pitch: "It was a lack of concentration and then a mistake, another mistake, another mistake. We switched off. It really hurts.
"Manchester United shouldn't lose in this manner. It really hurts, it's embarrassing and we've let a lot of people down. We've let ourselves down and the staff down.
"We need to look in the mirror, we are nowhere near it at the moment. Maybe it's lucky that we've got a break now.
"When we went down to 10 men maybe we gave up, there wasn't that character on the pitch. We were too quiet and naive. There was many mistakes, we need to do more.
"It's embarrassing. I was embarrassed on the pitch. We need a long hard look at ourselves."
Former United captain Gary Neville added: "I can't believe we are where we are. There's no excuse for those players on that pitch because they were absolutely pathetic. Spineless in that second half.
"I think these players expected to get help [in the transfer window] but they've not helped themselves.
"City and Liverpool pulled away psychologically before the season even started."
It is the third time United have conceded six goals in a Premier League game after their 6-3 loss to Southampton in October 1996 and a 6-1 defeat at the hands of Man City in October 2011.