The 28-year-old played his first competitive game since August in the Under-23s' Checkatrade Trophy win against Notts County after recovering from elbow surgery.
“For me, I left the pitch when I was No 1 and I am still No 1 in my mind," said Mannone.
“I want to be back. I haven't been fit in the last couple of months and haven't been on the pitch to compete.
“As I was injured, I couldn't do anything about it.
“Now I'm back, I can push and hopefully get my place back and prove to the manager I am still number one.
“For me, it is a challenge every day. Playing for my life and playing for myself and my family."