SHAUN Williams put Millwall's first defeat in 13 games down to a lack of cutting edge in the final third.
The Lions mustered only one shot on target during Saturday's 1-0 loss to Rotherham United as their unbeaten run came to a halt.
And Williams said: "All runs must come to an end sometime but for that to happen against Rotherham at home is a bit of a shock for us and a bit disappointing.
"It's the old cliche, we could probably still be out there and we wouldn't have scored. They defended well and we just didn't create enough chances."
Millwall have a poor record against newly-promoted sides – winning just one of six matches against Yeovil Town, Doncaster Rovers and Bournemouth last season.
"We beat a lot of big teams at the end of last year and it's the lesser teams that we seem to struggle against," Williams added.
"Every game is different because you play different tactics against different teams – and it just wasn't to be on Saturday.
"It's only loss in 13 games – we were always going to lose a game eventually – but it's just unfortunate how it happened. We'll knuckle down for Blackpool next weekend."
Williams was last week tipped by Ian Holloway to make the Republic of Ireland squad.
When asked about his international ambitions, the midfielder said: "Hopefully – if I keep my place in the team, I'm playing well and the team's doing well [it could happen].
"It would be a dream come true for me to represent my country.
"I've said before that my club football comes first. If I'm doing well for Millwall, it'll be all well and good if I get selected for Ireland.
"If I'm doing well hopefully my opportunity arises but in the meantime I'll continue to do the right things for the club."