Burnley boss Sean Dyche admits they switched off at the wrong times in defeat at Southampton.
Saints fought back from two goals down to win 3-2 on Sunday.
Dyche said, "We had a lot of control in the first half an hour and did the simple things well. Then we flat-lined for 15 minutes. You cannot do that in the Premier League.
"Without being disrespectful to Southampton, we presented them with a chance to win the game and were a little bit naive.
"The second half was a ding-dong. We've gone from having game after game to having three weeks off. It's tricky and we didn't react like we normally do.
"That said we should and do know how to see games off. It was a strange game because there were a lot of good things about it.
"We had a lot of control in the first half an hour. There were good moments."
The Clarets manager also said: "We know the requirements of the Premier League and what you have to do to see things through. I thought they were a bit flat for the first half hour and I thought we capitalised on that.
"A strange game. Take the goals out of it, which unfortunately we can't, a lot of our game was right. A lot of what we wanted to do was good. We came away from the basics which is definitely not like us. We've got games left. We thought this was a good opportunity, but it's a frustrating one today.
"We've had three weeks without a game, you can never quite quantify whether that makes a difference, but we'll get sharper. It's a clear reminder of the reality of the Premier League, if you don't perform for 45 minutes, you don't get what you want."
