Derby County first team coach Liam Rosenior has hailed the impact of Wayne Rooney since his arrival.

Manchester United legend Rooney's arrival as player-coach at Pride Park signalled a dramatic improvement in Derby's fortunes.

Rosenior said: "From a physical point of view he's not where he used to be, but in terms of his brain he's an even better player now than he was at the peak of his career, because he is helping four, five or six players around him all the time in his positioning and the weight of his passes.

"He didn't come swaggering in. He walked in like a normal guy and spoke to everyone in a normal way. I've already learned in a short space of time what it takes to be a world-class footballer.

"He absolutely loves the game. When he finishes training he'll come into the coaches' office and all he wants to do is talk about football. He has an unbelievable mind for the game and you can see why with his performances."