Preston North End boss Simon Grayson has admitted that he is unsure when Stuart Beavon will return from a knee injury.

The forward suffered the knock in his side's 2-0 pre-season win over Chorley, where Grayson revealed that the 29-year-old "jarred his knee".

Grayson told the Evening Post: "Stuart has taken a knock and we'll see how he is over the next few days. It is not ideal that you get injuries in pre-season and hopefully it won't be too bad.

"He tried to ride the challenge but got caught and that jarred his knee."

Beavon joined Preston from Wycombe Wanderers in 2012.