Chris Wilder expects another tough test for his side in Wednesday's clash with Birmingham City.
Although the Blues will arrive at Bramall Lane in 21st place in the Sky Bet Championship table, the United manager believes City have strong credentials to succeed this season.
He remarked: "Birmingham City are a very competitive side and having watched their games to date, like they all are in this division, they've been very tight.
"Our game at Bristol was the same, all three results could have happened and unfortunately for us the disappointing result did happen, but we could have easily won it and Birmingham will be thinking they could have possibly had three or four wins by now."
Wilder continued: "Garry (Monk) will have hoped to have turned losses into draws and draws into wins, if they'd done that they'd be in a lot healthier position.
"It's not crisis time there, they've got an excellent manager and some quality players who they've invested a lot of money in.
"The transfer embargo won't have really affected them in my opinion, they've not been left with a bunch of kids who would struggle in this division.
"They've got players with vast Championship experience throughout the team and they've heavily invested previously, the only situation is that Garry hasn't really added to that group in the summer."