He was left out of the squad altogether for last weekend's Championship draw with Cardiff City, despite returning from suspension. Josh Lillis started with Sam Slocombe on the bench.
Murphy, 28, stressed on Saturday that he had not handed in a transfer request, but told the Scunthorpe Telegraph he would take action if he did not return to the starting XI soon.
"If something needs to be done I'll have to do it because I need to be playing football," he said.
Nigel Adkins, the Iron manager, said Murphy was still first choice keeper at the club.
““That’s a good question, and one we’ll find out the answer to when the teamsheet comes in. It’s good, that’s what it’s all about – making decisions," he said, when asked who would play in goal on Sunday.
"Joe Murphy is the No. 1 goalkeeper, I’ve stated that all along. He has plenty of football to play for us this season in what we hope to achieve.
“Young Josh has done very well, he’s an up and coming goalkeeper we’ve brought through our ranks and it’s great that we’ve been able to give him more games to gain valuable knowledge."
Andrew Wright is a doubt for the Iron having hurt a foot during training on Friday.