Wycombe Wanderers manager Gareth Ainsworth says his League Two table toppers cannot get carried away.
Tuesday's 1-0 win over Cambridge thanks to Michael Harriman's goal put them a point clear of second-placed Plymouth.
"It's great to be sat there, it's a good start to the season but we look at our squad sometimes and we know we're punching above our weight," Ainsworth told BBC Three Counties Radio.
"It's great to know what the boys will give week in, week out."
Ainsworth continued: "Injuries and suspensions will kill us; we've picked one up tonight with Michael Harriman who may have tweaked his groin which will put us down again.
"This group of lads keep achieving, the new boys that have come in look like they gelled really well with the rest of the groups."
Former QPR midfielder Ainsworth, who first took charge as player-manager in September 2012, is the 10th longest-serving manager in England's top four divisions,
The 42-year-old led his side to the League Two play-off final at Wembley last year, where they lost to Southend on penalties.
The Chairboys have taken that form into this season, losing just once in the league - against second-placed Plymouth - and Ainsworth says that despite linked to the vacant Rotherham and Doncaster posts he is happy at Adams Park.
"They can link me all they want. [Chairman] Andrew Howard would be so proud that we're getting linked, that's his take on things and he knows the food chain as much as I do.
"But I am so, so happy here. Me and the family came here five years ago, we're settled, the football's good, the fans are great, things are going well.
"I'm not about to be looking elsewhere. Natural things take their course and if they don't, fantastic, I'm a lucky man to have a manager's job and really appreciate every day with the boys."