The 32-year-old goalkeeper has signed a deal with the Reds following the departure of Simon Mignolet on a permanent switch to Club Brugge earlier today.
“I’m feeling really happy; really happy to be here and to work in this great club and start doing my stuff on the pitch as soon as possible,” he told Liverpoolfc.com.
“I’m very ambitious, I come here to try to win everything, to try to push Ali from the first minute and to make us better.
“Obviously I want to win titles. I come here to fight for all the competitions. We have many competitions ahead – we’re going to fight for it and try to get them.
“I’m looking forward to playing my first game at Anfield and to win as many games as we can.”
Watch: Adrian's first interview on LFCTV GO
Adrian arrives after his six-year spell with West Ham United came to an end at the conclusion of last season.
The Spaniard joined the Hammers from Real Betis in July 2013 and went on to make 150 appearances for the club.