Wijnaldum played his last game for Liverpool on Sunday in their 2-0 win over Crystal Palace at Anfield.
After five successful seasons on the red half of Merseyside, the 30-year-old Netherlands international will embark on a fresh challenge.
Wijnaldum joined Jurgen Klopp’s side from Newcastle United in the summer of 2016 and won one Premier League title, one UEFA Champions League trophy, one FIFA Club World Cup and one UEFA Super Cup during his time at the club.
"I'm fighting against tears right now. The people in Liverpool have shown me love during the five years. I will miss them, you know?" Wijnaldum told Sky Sports after the final whistle.
"I hope to have played many more years for the club but unfortunately things went different. I have to start a new adventure.
"I knew I went to a big club. I remember that I was sitting in the living room and the manager said when I come to Liverpool we would win prizes. I am happy it went that well. It would have been really painful to leave the club without any.
"It's really special. Since I've joined the fans have sung my name. Week-in, week-out they saw I was giving 100% to give everything for this club. That's what the supporters want to see and that's what they appreciate from me. It is something I'm going to miss."
Wijnaldum has been linked with the likes of Barcelona and Paris Saint Germain.
