David Jones has expressed concerns over Derby County's preseason form.

The former Manchester United midfielder was disappointed with their performance in this week's defeat to Crewe and told the Derby Telegraph: "You've got to start playing at a higher tempo than we did last night and start showing that we're Premier League players.

"Maybe the effort was questioned a little bit and the lads need to raise their game.

"You've got to put on a performance but not enough players did last night."

Jones felt there was an absence of motivation last night.

"Although it's only a friendly, you've got to get your mentality right for these games," he said. "They are difficult to play in. It's easy to get yourself up for Premier League games - you're just ready.

"But games like last night is more of a test of your mental strength - can you get up for games like that?

"It was disappointing. You don't want to lose any game, whether it's pre-season or a competitive game."