The former Sunderland goalkeeper will compete with Pepe Reina and Brad Jones as Reds No1.
He said: “It’s a challenge but that’s what you want. You want to play in the big games, you want to play for a big club and to play with pressure.
“I’m very confident and I can’t wait to get my first clean sheet.
“I’ve been in big competitions wherever I’ve been — in Belgium with the national team and in Sunderland with Craig Gordon and Keiren Westwood, who are internationals.
“Now it’s the same again with Pepe and Brad Jones.”