Jurgen Klopp described Liverpool new boy Thiago Alcantara as an "exceptional" player who can bolster an already formidable side.
The Premier League champions confirmed on Saturday (AEST) they have brought in the 29-year-old from Bayern Munich in a deal worth up to £25 million (A$44 million).
Thiago has arrived at Anfield on a four-year contract, with the Reds paying an initial £20 million, plus an additional £5 million in potential bonuses.
The Spain international played an instrumental role in Bayern Munich's Bundesliga and Champions League triumphs last season and Klopp is delighted to have secured the services of such a talented player for a relatively small fee.
"It's pretty simple: he is – and nobody would see this in a different way – an absolutely exceptional player," Klopp told a news conference.
"It is difficult to improve the team in a normal way. Again, nothing to do with other teams, but if you take out £300 million or £400 million then maybe we could find a player, but even then it's not easy.
"In this specific case, he really brings a different dimension to our game and has some skills that are in general pretty rare and that suits us well. He's different and that's what I was very interested in.
"As well as that, he was pretty excited about the opportunity and did not need a lot of convincing. It always helps when a player really wants to be part of a specific project so all the things came together, and that's a win-win situation. I'm really happy we could do it."
Thiago is not available for Liverpool's Premier League clash with Chelsea on Monday but could make his debut against Lincoln City in the EFL Cup on Friday.