JOHN Mousinho believes no-one in the Oxford United side can be certain of starting at the Valley tomorrow.

The visit to Charlton Athletic will be the first Sky Bet League One game under Derek Fazackerley.

The caretaker boss played a back three in last week’s Checkatrade Trophy tie at Chelsea Under 21s, where the U’s suffered a third defeat in a row.

Recent form, players returning from injuries and the additions this week of full backs Todd Kane and Ashley Smith-Brown make the XI difficult to predict.

With Rob Dickie, another January signing, pushing for a debut, Mousinho knows there is scope to freshen up the side.

United’s captain said: “I’m not taking anything for granted. It could be anything, we have a few fresh faces.

“We’ve got a new left back, right back and there’s Rob Dickie, who has been here for a few weeks and has done really well.

“Anything could happen and going into Saturday I don’t think anyone’s place is secure.

“That’s a healthy position to be in.

“We’ve added to the squad and hopefully this provides us with competition for places.”

Wes Thomas and Joe Rothwell are in the frame for selection, having completed a full week’s training after recovering from hamstring problems.

But Cameron Brannagan’s debut will have to wait for at least a week.

Fazackerley said: “Cameron had a scan on his ankle on Monday.

“He’s likely to be another seven days before he’s training, but they seem to have got to the bottom of the injury, which is good.”