Ole Gunnar Solskjaer admitted he was delighted to have striker Anthony Martial back in the Manchester United fold following Sunday's 3-1 Premier League win at Norwich.
United recorded their first league away win since February despite Canaries goalkeeper Tim Krul saving penalties from Martial and Marcus Rashford.
Scott McTominay gave the visitors the lead with United's record 2,000th Premier League goal, while VAR intervened to award United a spot-kick only for Rashford's effort to be saved – but he made up for it moments later with his 50th club goal.
Martial – who made his first start since August and scored the winner during the midweek Europa League win over Partizan Belgrade – atoned for his own penalty miss with a goal in the 73rd minute before Onel Hernandez netted a late consolation for Norwich.
On the importance of Martial, United boss Solskjaer said: "It's vital for us. He's a top striker and to have him back fit, smiling, enjoying his football – that's a big thing for us.
"He's clever in his movement.
He said: "We were not physical enough.
"My players always invest everything and we showed character in the second half but we were not good enough in the first half.
"If you are not there and everything is not top class, you have no chance as a newly-promoted side.
"There were a few things I was not happy with in the first half."