Aymeric Laporte, a defender from Spain, left Manchester City to sign with Al Nassr of the Saudi Pro League for 27.5 million euros (£23.6 million).
Athletic Bilbao sold the 29-year-old to City in January 2018 for a then-club-record £57 million.
Although he played in just 24 games when the Blues won the Triple last season, he assisted City in winning 12 major awards.
Laporte praised supporters and teammates for a “unforgettable” tenure at the club in a farewell post on social media.
“It has lasted five-and-a-half unforgettable years. Plenty of memories that I will keep forever close to my heart,” said Laporte.
“From trophies to setbacks, victories to injuries, it’s all been part of my journey, and I’m grateful for absolutely every moment that shaped me into who I am today.”
“It was an honor and a pleasure to wear these colors and I hope you will remember me in a good way. I will always be a City fan and I look forward to seeing you all again.”
Aymeric Laporte played 180 times for City, scoring 12 goals, but his opportunities were few last year.
In addition to spending £77 million to sign Croatian defender Josko Gvardiol earlier this month, manager Pep Guardiola decided to play defenders Manuel Akanji and Nathan Ake more frequently.
“Aymeric has been an excellent player for Manchester City during a great time for the club,” said City’s director of football, Txiki Begiristain.
“He fit into the team seamlessly upon arrival in 2018 and played a key role in many of our successes over the years that followed.
“The form of the other defenders in the squad made it hard for him to find sufficient game time in 2022-23 and we respect his decision to seek a move elsewhere.”
With 22 caps under his belt and having switched from France to Spain in May 2021, Laporte has already helped Spain win the Uefa Nations League final in June.
Aymeric Laporte joins Cristiano Ronaldo, Sadio Mane, Marcelo Brozovic, Alex Telles, and Seko Fofana as the newest well-known player to join Al Nassr.
Al-Ittihad, Al-Hilal, and Al-Ahli are the other three Saudi Pro League clubs that will be taken over by Saudi Arabia’s Public Investment Fund (PIF) in June.
In a deal for up to £30 million, Riyad Mahrez, a former City teammate of Laporte’s, joined Al-Ahli last month. Other sportsmen making moves to Saudi Arabia this summer include Karim Benzema, N’Golo Kante, Ruben Neves, and Neymar.