In May 1999, Hyypiä was signed by Liverpool, the team he supported as a boy, for £2.6 million, having been recommended to former chief executive Peter Robinson by a TV cameraman.
Initially, Hyypiä was regarded as an unknown who would not live up to expectations, but this preconception was dismissed when he immediately formed a successful central defensive partnership with fellow arrival Stéphane Henchoz.
Almost ten years later in a farewell tribute to Hyypiä, Ron Yeats, then the chief scout for Liverpool, commented that the deal was "one of the best bits of business we've done over the years… a steal – a bargain…" Fourteen years on, Hyypiä himself told the BBC that joining Liverpool was a dream come true.

In the 2000–01 season, Hyypiä shared the captaincy of Liverpool with Robbie Fowler while Jamie Redknapp, the full-time captain, was suffering from a long-term injury.
During that season, Hyypiä and Fowler led the team to a cup treble: the Football League Cup, FA Cup and UEFA Cup.
He also went on to claim a "treble" of three consecutive FAF Finnish Footballer of the Year awards from 2001–03.

In 2002, Hyypiä became first choice Liverpool captain after Redknapp, who had been blighted by long-term injuries, and Fowler both left the club.
However, after such a bright start to his Liverpool career came a relative lull and in 2003, Hyypiä was replaced as Liverpool captain by Steven Gerrard.
With some of the pressure lifted, his performances generally improved.

On 5 April 2003, Hyypiä received a red card against Manchester United, the only red of his club career. "[
Ruud] Van Nistelrooy was going through and maybe I took his shirt a little bit.
The referee thought so.
I got a straight red card.
They got a penalty.
It was an agony to watch the game in the dressing room.
The only red card of my career.
You remember that sort of thing."

In 2004, new Liverpool manager Rafael Benítez moved Jamie Carragher from fullback to partner Hyypiä in central defence.
This seemingly reinvigorated Hyypiä and the team went on to have a successful season, winning the 2004–05 Champions League on the back of their solid defence.
On 10 August 2005, it was reported that Hyypiä had agreed to a new three-year contract after weeks of talks with the Reds which would keep him at Anfield until 2008.

During the 2005–06 season, Hyypiä was relegated to third-choice captain after Jamie Carragher's ascent as Gerrard's deputy on the field.
In the FA Cup Sixth Round against Birmingham City, he scored the opening goal in the first minute as the Reds thrashed the home team 7–0.
He started in the victorious 2006 FA Cup Final against West Ham United, though he missed his spot kick in the penalty shoot-out.
During the season, he climbed into the top 25 in the club's all-time appearances table after featuring in the League Cup against Arsenal in January 2007.

Despite speculation in the summer of 2007 linking him to various other Premier League teams, Hyypiä insisted that he would stay at Liverpool for the remainder of his contract.
On 25 August 2007, Hyypiä broke his nose during an away match against Sunderland in the Stadium of Light.
He quickly returned on the pitch to play against Toulouse in the Champions League qualifying match on 28 August 2007, in which he scored the second goal for Liverpool while wearing the captain's armband in the absence of Steven Gerrard and Jamie Carragher.

In April 2008, Hyypiä signed a new deal until summer 2009, with Benítez stating he is a good role model for young defenders such as Martin Škrtel and Daniel Agger.
The 2008–09 season marked the defender's tenth season at the club.
On 22 August 2008, Premier League newcomers Stoke City offered £2.5 million for Hyypiä, but Liverpool rejected the offer.
On 2 March 2008, with his appearance against Bolton Wanderers, Hyypiä made it into the top 20 Liverpool player appearances of all-time.

Hyypiä was voted in 19th place in Sky Sports' "Top 50 Premier League Foreign Players", 45th in FourFourTwo magazine's 100 Greatest Foreign Players and 38th in Liverpool's 100 Players Who Shook the Kop survey
In May 1999, Hyypiä was signed by Liverpool, the team he supported as a boy, for £2.6 million, having been recommended to former chief executive Peter Robinson by a TV cameraman. Initially, Hyypiä was regarded as an unknown who would not live up to expectations, but this preconception was dismissed when he immediately formed a successful central defensive partnership with fellow arrival Stéphane Henchoz. Almost ten years later in a farewell tribute to Hyypiä, Ron Yeats, then the chief scout for Liverpool, commented that the deal was "one of the best bits of business we've done over the years… a steal – a bargain…" Fourteen years on, Hyypiä himself told the BBC that joining Liverpool was a dream come true.
In the 2000–01 season, Hyypiä shared the captaincy of Liverpool with Robbie Fowler while Jamie Redknapp, the full-time captain, was suffering from a long-term injury. During that season, Hyypiä and Fowler led the team to a cup treble: the Football League Cup, FA Cup and UEFA Cup. He also went on to claim a "treble" of three consecutive FAF Finnish Footballer of the Year awards from 2001–03.
In 2002, Hyypiä became first choice Liverpool captain after Redknapp, who had been blighted by long-term injuries, and Fowler both left the club. However, after such a bright start to his Liverpool career came a relative lull and in 2003, Hyypiä was replaced as Liverpool captain by Steven Gerrard. With some of the pressure lifted, his performances generally improved.
On 5 April 2003, Hyypiä received a red card against Manchester United, the only red of his club career. "[Ruud] Van Nistelrooy was going through and maybe I took his shirt a little bit. The referee thought so. I got a straight red card. They got a penalty. It was an agony to watch the game in the dressing room. The only red card of my career. You remember that sort of thing."
In 2004, new Liverpool manager Rafael Benítez moved Jamie Carragher from fullback to partner Hyypiä in central defence. This seemingly reinvigorated Hyypiä and the team went on to have a successful season, winning the 2004–05 Champions League on the back of their solid defence. On 10 August 2005, it was reported that Hyypiä had agreed to a new three-year contract after weeks of talks with the Reds which would keep him at Anfield until 2008.
During the 2005–06 season, Hyypiä was relegated to third-choice captain after Jamie Carragher's ascent as Gerrard's deputy on the field. In the FA Cup Sixth Round against Birmingham City, he scored the opening goal in the first minute as the Reds thrashed the home team 7–0. He started in the victorious 2006 FA Cup Final against West Ham United, though he missed his spot kick in the penalty shoot-out. During the season, he climbed into the top 25 in the club's all-time appearances table after featuring in the League Cup against Arsenal in January 2007.
Despite speculation in the summer of 2007 linking him to various other Premier League teams, Hyypiä insisted that he would stay at Liverpool for the remainder of his contract. On 25 August 2007, Hyypiä broke his nose during an away match against Sunderland in the Stadium of Light. He quickly returned on the pitch to play against Toulouse in the Champions League qualifying match on 28 August 2007, in which he scored the second goal for Liverpool while wearing the captain's armband in the absence of Steven Gerrard and Jamie Carragher.
In April 2008, Hyypiä signed a new deal until summer 2009, with Benítez stating he is a good role model for young defenders such as Martin Škrtel and Daniel Agger. The 2008–09 season marked the defender's tenth season at the club. On 22 August 2008, Premier League newcomers Stoke City offered £2.5 million for Hyypiä, but Liverpool rejected the offer. On 2 March 2008, with his appearance against Bolton Wanderers, Hyypiä made it into the top 20 Liverpool player appearances of all-time.
Hyypiä was voted in 19th place in Sky Sports' "Top 50 Premier League Foreign Players", 45th in FourFourTwo magazine's 100 Greatest Foreign Players and 38th in Liverpool's 100 Players Who Shook the Kop survey
Sami Hyypiä