Newcastle boss urges Martins to grab chance
"That is something you have to deal with, having strikers competing for the top places. Mark Viduka being fit is a key element for us at this stage.
"The combination of Michael, Mark and Oba - I've been waiting to see if they can gel on a regular basis. But, as it has gone up to now, it's difficult to keep any pair together.
"Oba can get the job done. We know he can score a goal, we know he is a big threat with his pace and I am sure he likes the big games."