Chris Wilder felt Saturday's win at QPR saw his players answers questions that have been asked of during last week.
United travelled to the capital on the back of defeats to Swansea City and Middlesbrough, but goals from Billy Sharp and David McGoldrick got United up and running and Wilder was understandable pleased.
He remarked: "When you fall a little bit short like we have done at times in the first two games and been punished, people will question things.
"But we've taken it on the chin, we're a tight group and it is just good to get off the mark with a win.
"We picked the team to win the game and positive substitutes to help us achieve that like we always do.
"We had to work hard for the victory, the players came in and did well and the ones that were left out gave them their backing, that's always the case here."
Wilder was also keen to praise his on-loan goalkeeper Dean Henderson, following a string of crucial saves at Loftus Road.
The boss added: "Dean is a good young goalkeeper and a lively boy who is already striking up a relationship with the supporters and he's keeping an excellent goalkeeper in Simon Moore out of the team at the moment.
"You could see what it means to everyone at the end, it's not the biggest result in our history, but it is an important one."