Liverpool signed Spain midfielder Thiago Alcantara from Bayern Munich for a reported fee of £20 million ($26 million) on Friday.
Thiago agreed to a “long-term contract” with the Premier League champions after deciding to end his seven-year stay with Bayern.
The 29-year-old moves to Anfield after helping Bayern win the Bundesliga, the German Cup, and Champions League last season.
“I think it’s an amazing feeling. I was waiting for this moment for a long time and I am very happy to be here,” Thiago told Liverpool’s website.
“When the years are passing, you are trying to win as much as you can – and when you win, you want to win more. I think this club describes what I am as well; I want to achieve all of the goals, win as many trophies as possible.
“It also [has] this kind of family [feeling] that I need because we [like to] have a very close relationship with the club and I think I will feel this, I will have this feeling, with this club as well.”
The 29-year-old, who also has 39 caps for Spain, spent seven seasons at the Allianz Arena having transferred to Germany from FC Barcelona, where he began his career.
He added: “I must adapt to the team as fast as I can in the situation and the context that we are living right now.
“Everything is more compact and we started a little bit later, but still it is football and I think we have to mix all the big things up, all the good things we have. I will help the team in a defensive and offensive [way] and also in a mental aspect.
“[The fans] are not more excited than I am, for sure not! It is not about saying words, it is about doing the things. I will give my heart on the field to my teammates, the club and also to the fans.”
Liverpool manager, Jurgen Klopp, said: “Absolutely great – I’m really happy that it finally worked out and we could just do it,” said
“I know all the people at Bayern wanted to keep him desperately. That’s normal and understandable because he played an important role, in the last season as well.
“He just was ready for a new challenge and he decided for us.”
He added: “When we spoke about all the players, he respects them all massively. He admires them.
“We played against him when we played Munich in the Champions League two years ago [Liverpool won 3-1 in the second leg of their last-16 tie after a 0-0 draw at Anfield], so he knows what kind of machine we can be and he wanted to be part of that.”