In the summer of 2017, Cengiz Under joined Marseille from Turkish club Galatasaray. The move was a significant one for both players and fans alike, as Under brought with him a reputation as one of Europe's most talented young forwards.

Under quickly made an impression at Marseille, scoring several important goals in the French league and contributing to the team's success. His performances were so impressive that he was named the Ligue 1 Player of the Month for October 2017. He also scored the winning goal in a crucial match against Paris Saint-Germain, helping Marseille secure their place in the Europa League playoffs.

However, Under's time at Marseille has not been without its challenges. Injuries have plagued him throughout his career, and he has struggled to maintain consistency in his performance. Despite this, he remains a key player for the team, and his presence on the pitch is always felt by both supporters and opponents.

Overall, Cengiz Under's impact on Marseille has been significant. His talent and ability to score important goals have helped the team achieve success, while his leadership and work ethic have contributed to the team's overall spirit. While there have been ups and downs along the way, it is clear that Under will continue to be a valuable asset for Marseille for years to come.