Queens Park Rangers boss Mark Hughes is looking for an improvement from his side after they secured the first win of his reign against MK Dons.
Tuesday's 1-0 FA Cup third round replay win was Rangers' first in 11 games and first in the competition since 2001.
It sets up a fourth-round tie against Chelsea after Danny Gabbidon scored with a second-half header.
"The desire is there for everyone to see... but we can improve," said Hughes, who took over a week ago.
"Given the run the team has been on, perhaps there is a lack of confidence in each other."
QPR, who are in the Premier League's relegation zone, struggled at times against the League One side, who passed the ball well but failed to take their chances.
Both Charlie MacDonald and Jobo Ibehre had good opportunities to open the scoring, while Shaun Wright-Phillips also had a shot saved after being put clean through.
Then, just as it looked like the game might go to extra time, with Hughes' side having been beaten by Newcastle on Sunday, Gabiddon nodded in his first goal for nearly seven years.
Hughes told BBC Radio 5 live: "Obviously, they had a real desire and it was a big night for them. They came here with the right attitude and gave us a real game.
"But credit to our players. They stuck at it. Everybody here understands the importance of getting a win and we are able to look forward to a good tie against Chelsea.
"The main thing was to get a win back on the board and that has been a long time coming.
"Every game we play in now is a big game because of the circumstances we find ourselves in. We have a huge game at the weekend against Wigan, which thankfully we have little bit of time to prepare for now."
Hughes, who has been out of the game for seven months since leaving Fulham, added: "The challenge is huge, but we are ready for it."
MK Dons boss Karl Robinson took heart from his side's performance as they made light work of the 31 league places between the two sides.
"I'm proud, but disappointed we didn't win," he said. "We had enough chances, but just never took them.
"Our players can come away from here feeling very proud and I thought we outplayed them for long periods of the game.
"We try to play football the right way and think that we've proven that over these two games. We've shown tonight that we can compete with a very good QPR team."