The Red Devils won both Premier League Matches under the German manager are 1-0, beating Crystal Palace at home and passing a tough test away against Norwich on Saturday.
United were affected by “a small number” of positive Covid-19 side flow test results on Sunday but the clash in west London continues with the goal of keeping a third consecutive clean sheet in the tournament.
Asked about the importance of another match, Rangnick, speaking after the Carrow Road win, said: “It can only be achieved as a team. It’s not just four defenders, a goalkeeper and two great players.
“The whole team has to defend together and like I said so far, we’ve kept two clean sheets in the league. We won again 1-0 in a difficult game.
“We tend to call those games dirty away wins, 1-0. Those are usually the best shots but in the second half, in my opinion, we conceded too many corners and free kicks from the side.
“So until the last minute the game could go the other way and we need a great goalkeeper, a couple of headers in the center of the defence, to keep a clean sheet.”
United pressed on with intensity in Rangnick’s first game against Palace but that was largely non-existent last weekend.
While the experienced manager questions his opponents’ performances, he wants to see more from his players in London.
Rangnick added: “We need to take the next steps. It’s about taking the next steps, and it’s easier to take those steps if you’re winning the game.
“In defence, the centre-backs and the two six-man players did very well. Now we need to try and improve the way we play with the ball up front. ”
The former RB Leipzig boss watched Brentford’s 2-1 win over Watford on Friday and predicted another eye-opening encounter.
With a quick turnaround from the trip to Norfolk, changes could be made with Luke Shaw on the bench at Norwich while Aaron Wan-Bissaka and Edinson Cavani will return from injury problems respectively. .
“I watched the Brentford game against Watford. Once again, another high intensity team,” admitted United’s interim manager.
“It could be more physical than the way Norwich have played and we need to be aware and prepare for that different level of intensity.
“We have to wait and see (change too much). A few players could return, like Luke Shaw, who was already on the bench. Maybe there will be Aaron Wan-Bissaka and even Edi could be an option but we have to wait and see.”
United will have to assess Victor Lindelof after he was forced off the field against Norwich with difficulty breathing although Rangnick revealed after the game that the Swedish defender was “fine” after club doctors the department tested him.
One player who is certainly not expected at Brentford is Anthony Martial, who continues to struggle with a knee injury.
Martial’s agent also made a comment over the weekend about his client looking to leave Old Trafford.
But Rangnick said: “If he has a desire to go to another club, then the player has to inform the management or myself.
“I do not communicate with agents through the media and the press. The player didn’t talk to me or us about it.
“After the last training session before the match against Crystal Palace, after training with the whole team, he informed the doctor and medical staff that he would not be present because the pain in his knee was too great, so We have to wait and see with Anthony. .
“Honestly, what his agent says through the media doesn’t interest me very much.”
https://www.independent.co.uk/sport/football/ralf-rangnick-manchester-united-brentford-anthony-martial-aaron-wanbissaka-b1975078.html Manchester United: Ralf Rangnick happy to land another ‘dirty’ win at Brentford