Alisson has become the most expensive goalkeeper in history after Liverpool paid Roma £65million to land Brazil's No 1.

This is a huge statement of intent from Liverpool and takes their spending for this window to £174.45million on the back of deals for Guinea midfielder Naby Keita, Brazil international Fabinho and Switzerland forward Xherdan Shaqiri.

Alisson arrived on Merseyside on Wednesday and underwent a medical at Liverpool's Melwood training base.

Liverpool have announced the signing of goalkeeper Alisson from Roma in a £67.5m deal

The Brazilian has become most expensive goalkeeper in the world after passing a medical

The acquisition of Alisson takes Jurgen Klopp's summer spending up to £174.45million

Alisson described his move to Liverpool from Roma on Thursday as 'a dream come true'

Alisson said of the record move: 'In terms of my life and my career, it's a huge step for me'

He signed a six-year deal before heading back on a private jet to Italy to conclude the remainder of his holiday.

Liverpool first asked Roma about Alisson in January but were initially quoted a fee of £90million.

They moved swiftly for the 25-year-old at the beginning of this week when Chelsea – their main rivals for his signature – were trying to sell Thibaut Courtois to Real Madrid.

Upon putting pen to paper, the Brazil international told the Liverpool website: 'I'm really happy, it's a dream come true to wear such a prestigious shirt for a club of this size that is used to always winning.

'In terms of my life and my career, it's a huge step for me being part of this club and this family. You can be certain that I'll give my all.'

He admits playing at Anfield in April, where a rampant home side put five past him in an astonishing display, helped make up his mind.

Brazilian goalkeeper Alisson poses in Liverpool colours as he signs his contract at the club

Alisson passed a medical on Thursday after cutting short his holiday in Sardinia this week

The 25-year-old takes a selfie as he gets used to his new surroundings at Melwood

Alisson gives thumbs up to the camera as he poses with the club crest during his unveiling

Alisson admitted Liverpool's five-goal blitz against Roma in April influenced his decision

FIVE THINGS YOU MAY NOT KNOW ABOUT ALISSON Sibling rivalry Alisson's brother Muriel is also a professional goalkeeper. As boys, they watched their father, who was a keeper for a team in their home town of Novo Hamburgo in Brazil. The brothers came through the ranks at Internacional together, but in the early years Alisson trailed behind his brother, who is five years older. 'When I entered my teens, I wasn't even the best goalkeeper in the family,' he told the Players' Tribune. Muriel now plays in Portugal for Belenenses. Alisson said he has his brother to thank for everything he has achieved for inspiring him to become a goalkeeper. Late bloomer While in the youth set-up at Internacional, he came close to quitting football. Alisson said he was a late developer, which left him smaller and weaker than the other goalkeepers. He became the third choice keeper and did not get picked to play in the biggest competition of the year for 14- to 15 year-olds. 'Honestly, I thought about packing it in,' he wrote in his Players' Tribune article. Thankfully he persevered and over the next year he grew by around seven inches, giving him the physicality to match his technique. Tough competition If competing with his brother for a starting place was not hard enough, Alisson also had to contend with former Brazil shot-stopper Dida at Internacional in 2014-15. The World Cup and two-time Champions League winner spent one year at the Porto Alegre club before retiring, age 41. He also had to wait a year behind the established Wojciech Szczesny after joining Roma, making just 10 Europa League appearances in his first season before taking over as number one after Szczesny's departure to Juventus. Alisson admitted he was close to leaving Roma if he was not promised regular football. Guitar hero Alisson is an accomplished singer and guitar player, regularly travelling with the instrument and once rounding off an appearance on Brazilian talk show 'The Noite with Danilo Gentili' with an acoustic performance in the studio. His other hobbies away from the pitch include video games and fishing. Family man The 25-year-old has been with his wife Natalia Loewe since 2012 and they got married in 2015. She was often seen cheering on her husband from the stands in Russia at the World Cup, donning a Brazil shirt. The couple have a one-year-old daughter together, Helena. By Press Association Sport Advertisement

'Yes, in part it did influence the decision,' Alisson added.

'When you make an important decision like this it's not just a decision to change clubs, it practically changes your entire life, my family's life, my wife, my daughter.

'That game definitely did have an influence but I also watched other games. I've seen other games where I could see the way Klopp had the team playing.

'That has made me really excited to be part of this group.

Jurgen Klopp is delighted to get his man, telling the club website: 'At one point in the last few weeks it came up, the opportunity to sign one of the world's best goalkeepers - then it's not a long thought, to be honest, it's only that you need to have a little talk with the owners! They were quite excited, so we did it.

'I think it's something we have to do. He has nothing to do with the price, we have nothing to do with the price, it's the market, that's how it is and we will not think a lot about it.

Alisson clasps hands with his new boss Jurgen Klopp during his unveiling on Thursday

The 25-year-old beams as he shares a hug with Klopp after completing his move to Liverpool

The Brazilian international arrived suited and booted ahead of undergoing his medical

'It shows the value of goalkeepers, of course, in this moment. It will happen a lot in the next few weeks I guess and that's it, so we are really happy to have him here now.

'His English is surprisingly good and he is a real personality. He has meanwhile a lot of experience in the last few years, in Europe and in Rome, he's played there on an outstandingly high level and he did the same at the World Cup.

'It was for Brazil not too lucky, that's how it is, but then he played a really good World Cup. So it's just a good moment.'

Michael Edwards, Liverpool's Sporting Director, concluded a deal with his respected counterpart Monchi that has seen the Anfield club pay an initial £56million guaranteed, £2.2million of that will go to Alisson first club Internacional.

Alisson poses in his suit alongside a Bill Shankly quote on the wall at Melwood

Alisson is put through his paces by the Liverpool physio staff as he undergoes his medical

Alisson gives a thumbs up to the camera after passing his medical and completing the move

Roma will then receive bonuses in terms of how Liverpool perform in the Champions League, Premier League and Europa League.

Whether Liverpool hit those targets or not, the figure regardless smashes the £35million Manchester City paid Benfica for Ederson 12 months ago

Roma were eager to squeeze every ounce out of the deal, having felt they allowed Mohamed Salah to leave too cheaply but Monchi said: 'Alisson is a top player, perhaps the best goalkeeper in the world.

'The offer from Liverpool was way above the market average. It was very significant.'

Liverpool have already recouped some of that investment, though.

They will allow Danny Ward – who had ambitions of becoming No 1 at Anfield – to move to Leicester for £12.5million. Liverpool will be due 20 per cent of any future sell-on fee.

The arrival of Alisson will almost certainly end the short Liverpool career of former No 1 Karius