The 23-year-old arrived in Italy from Istanbul Basaksehir in 2017
Roma have loaned Turkey winger Cengiz Under to French club Marseille for a year with an option to buy, both clubs confirmed on Sunday.
"Under joins the Ligue 1 side on an initial temporary basis until 30 June 2022," the Serie A club said, announcing a loan fee of 500,000 euros ($593,000) maximum based on certain factors.
"The agreement also includes an obligation for Marseille to make the transfer permanent based on the fulfilment of certain requirements."
A transfer fee of 8.4 million euros ($9.9 million) has been set with the Italian club receiving 20 percent of any subsequent moves the player makes.
The 23-year-old arrived in Italy from Istanbul Basaksehir in 2017 and has scored 17 goals in 88 appearances.
He spent the 2020-21 season on loan with Premier League side Leicester City.
For Turkey he has scored nine goals in 32 games, playing in Euro 2020 as they lost all three of their group games, scoring just once just.
"Very versatile, Cengiz Under is a dynamic winger, technical, adept at playing 1-on-1 with an ability to attack," Marseille said.
"His qualities have made him one of Turkey's most promising players and, once he has adapted to our environment, he will be able to make his mark in Jorge Sampaoli's squad," they added.
Marseille have also signed young US winger Konrad de la Fuente and Brazilian midfielder Gerson for next season.