Adrian says he’s felt valued and enjoyed his first season at Liverpool.
The 33-year-old goalkeeper joined the club on a free transfer in August after leaving West Ham.
“This club has totally exceeded my expectations,” he told the club’s official website.
“I think coming here was the perfect decision at the perfect time, to come to the best team in the world right now.
“I am really happy I took that decision, to have that patience in that moment of the summer and to be here.
“I prepare mentally exactly the same as when I am a No.1 because I never feel that I am a second ‘keeper forever, to sit on the bench and just wait and wait and wait and don’t care about playing.
“I prepare in every session of training like I was starting because that makes me feel ready – for when any opportunities come, I am ready for everything. I never prepare myself to sit on the bench at the weekend.
“Obviously Ali knows he is No.1 and he is doing well. He is a top ‘keeper, one of the best in the world, and all the prizes he has got he deserves because he showed that he deserves them.
“But I think that the competition is great, the healthy competition between us is better for us because it makes us improve.
“The comfort zone is not good for anyone anywhere in life – you need to improve every day and keep pushing and keep trying to do the best.
“I think that healthy competition, that good feeling we have between us is great for us, great for the team and great for the manager.”