Kinnear on Oba:
"We are monitoring it, but it is touch and go," he said.
"We are going to leave it as late as possible.
"He will have a fitness test on Saturday morning, but it's not looking too good at the moment.
"He got injured just before he scored, and that was why he didn't do his normal somersaults.
"He would be a big loss to us because we certainly need his pace. He has caused numerous problems to all the opposition we have played.
"But it is just wait and see, really."