Liverpool signed experienced goalkeeper Adrian on a free transfer in August 2019.
The Spaniard joined the Reds after six years in the Premier League with West Ham United, for whom he made a total of 150 appearances before embarking on a new chapter on Merseyside.
Adrian – who originally made the move to England from Real Betis – arrived as cover and competition for Alisson Becker following the departure of Simon Mignolet.
“It’s a great step in my career right now, after six good seasons at West Ham,” he said when the deal was completed shortly before the 2019-20 campaign got under way.
“I got experience in the Premier League and I’m coming to a big club to fight for everything. It’s a good challenge, a big challenge for me to face, challenging with big players here.”
He took the vacant No.13 shirt previously worn by new teammate Alisson.
On just his 10th day as a Red, the stopper was the hero when he saved the decisive penalty in a shootout with Chelsea to win the UEFA Super Cup.