Wing Walker an Ospreys doubt

The Scotland wing injured his ankle during the Ospreys' Magners League victory over Ulster last week.

But coach Lyn Jones is eager to give Walker as much time as possible to make the Vicarage Road clash on Sunday.

Jones said: "Our only new injury concern is Nikki but we will allow him as much time as possible to recover from his ankle problem."

The Ospreys are already without Wales scrum-half Mike Phillips for the rest of the season after damaging knee ligaments.