Alonso's Liverpool story is one of Champions League and FA Cup success, ridiculous long-range goals, defence splitting passes and general midfield mastery.
But the way it all came to an end left something of a bad taste in the mouth.
Fans all over the world were left devastated when the deal to take Alonso to Madrid - a deal which had been on the cards for 12 months after then manager Rafael Benitez confirmed his interest in pursuing the signing of Gareth Barry in the transfer market - finally went through in the summer of 2009.
Suddenly the club's midfield playmaker had gone; the man who made it all happen in the centre of the field and the man who had driven Liverpool to within touching distance of the league title with a record number of points.
Surely he would want to stay and help the Reds take that next, big, elusive step? We had gone so close - why did he have to end his Liverpool love affair now?
The truth can be found by rewinding 12 months when the manager dropped an end of season bombshell on his Spanish star.
"At the end of that season, speaking to Rafa, he told me the situation and that he wanted to sign other players and I could be one of the replacements," he explained. "If an offer would have come, probably I would have been sold. That's when I told myself that the situation had changed - from being a very important player to being one of those who can be sold to get funds to sign other players. I accepted it because I am a professional but you have to realise what your situation is. At the end nothing happened because there was no agreement and we started my last season in Liverpool, but knowing what had happened.
"I had to take it from their point of view. We knew what had happened and once we knew I was going to stay, if the manager was going to pick me then I was going to play as well as possible. There were no personal problems, it was a professional relationship.
"I didn't feel I had a point to prove. I knew what I was capable of giving to the team and what I had given for the four years - and then the last one. In the last one the team was really good, we were winning so many games, beating the top teams home and away and that made a big difference. Because of the silly draws we got at home at the beginning of the season, that's probably why we didn't win the Premier League. We felt we had a very good team, we were very competitive and it was a disappointment not to win the league.
"I didn't know what would happen but at the end of the season, knowing what had happened, I felt if another option was to come I needed to take another step in my career. It was very difficult to take that decision, but it was probably for the best for me because I was not comfortable with that situation and if I had stayed another season it would have been uncomfortable for me.
"I was really happy with the team and my teammates and felt that we could do great things. I was happy on that side but within a club you have to see the big picture and another season would have been too much for me.
"As soon as the season finished I talked to the manager. I knew that maybe Madrid were coming and I said if the terms were good then I wanted to leave."
Read the whole thing and more about his time at LFC here