Jose Mourinho believes Romelu Lukaku's superb Manchester United debut will help his confidence going forward.
Lukaku described it as a "dream come true" after the £75million summer signing struck in each half as United thrashed West Ham 4-0 at Old Trafford.
"To play in front of such a crowd and for such a great club, it's a dream come true," Lukaku told Sky Sports. "The most important thing is the win - the win was good."
Asked whether he felt relief given his hefty price tag, the Belgian added: "No, just joy for the team.
"When you play for Manchester United everybody has a job to do and mine is to score goals for the team.
"The team did a good job today, everybody was creative."
Mourinho said of Lukaku's goal-scoring start: "It's always important. New players in new clubs, new strikers, everyone expects goals from them.
"The pressure is with them. It's always nice for their confidence."
Despite seeing his side go top of the embryonic table, Mourinho still felt United could have come out of the blocks quicker.
He added: "The game was difficult, the game was open; at 2-0 they had a chance. I don't think the game was 4-0.
"Then of course, score the third goal and you can breathe and play with a lot of confidence.
"I think the reality of the game, this was always a difficult game for us.
"We didn't start especially well, we were a little bit nervous for 10, 15 minutes. Then we had a quality performance, good personality, they played with lots of confidence and have given the result.
"The team was confident and played great football. I'm happy, I think it was a very positive performance
"The fact that we start (by) winning and are top of the league means nothing, because last season we started winning and I think we were top of the league after the first match - it means nothing.
"The performance again, the levels of confidence, is what matters for me. We got three important points."