Joey Barton is putting himself through double training sessions to build up his match-fitness at Newcastle United.

The midfielder is "frustrated" that he has not hit the heights so far at Newcastle, after being out for three months with a broken metatarsal.

Toon boss Sam Allardyce said: "In terms of performance, Joey has not been reaching his standards or our standards for that matter.

"He's been frustrated by that, which is understandable because he's such a driven and determined person."