Sanchez took out Mbeumo simply 4 minutes and one second into the match to obtain Chelsea's earliest pink card within the Premier League.
“It was tough… the pink card [would be] tough not just for Chelsea, it [would be] tough for any membership,” mentioned Maresca.
“After the pink card, all of the planning and every part would not exist any extra.”
Maresca mentioned afterwards he would have most well-liked to go a objective down than lose his goalkeeper.
“It is the very best answer, as a result of we're nonetheless 95 minutes to play,” he mentioned.
“I believe even Robert is conscious of that, but additionally it is tough as a result of he has to take a call in a single second or two seconds.”
The Italian supervisor took off two attackers in Pedro Neto and Estevao Willian for substitute goalkeeper Filip Jorgensen and defender Tosin Adarabioyo after Sanchez was despatched off.
The change successfully left Chelsea with a again 5, three midfielders and simply Joao Pedro in assault.
Maresca defined why he had made such a defensive response to the dismissal, saying: “We would have liked to defend with 5 gamers – we will defend with 4 after we are 11 v 11.”
Nevertheless, that call appeared like a mistake when Fernandes opened the scoring and Palmer then went off injured.
When Andrey Santos changed the England playmaker 21 minutes into the match it was the earliest any staff in Premier League historical past had made their first three substitutions.
Chelsea didn't register a shot on course within the first half as Casemiro put United 2-0 up.
Nevertheless, the Brazil midfielder's ill-timed lunge simply earlier than the break left either side all the way down to 10 males.
Chalobah managed to drag a objective again within the eightieth minute but it surely solely proved to be a comfort for the Blues, who suffered a second successive defeat in what has been a tricky week of away fixtures.
They drew at Brentford final weekend earlier than shedding to Bayern Munich of their Champions League opener on Wednesday.
“When it went to 10 a chunk I felt no urgency from Chelsea to attempt to get again into it,” mentioned former England striker Wayne Rooney on Match of the Day.
“They have been sluggish, aspect to aspect. Should you're a Chelsea fan you'd wish to see much more urgency.”
Saturday's loss at Outdated Trafford leaves Chelsea sixth within the top-flight desk, and they'll hope to keep away from a protracted absence for star man Palmer.
