The soccer club you are referring to is Stade Rennais F.C., commonly known as Rennes. During the 2020/21 season, the club was indeed coached by Julien Stéphan until March 2021. Here are some details about Rennes during that period:

• Full Name: Stade Rennais Football Club
• Founded: 1901
• Stadium: Roazhon Park, located in Rennes, France
• Capacity: Approximately 29,778 seats
• League: Ligue 1, the top tier of French football
• President: Nicolas Holveck during the 2020/21 season
• Key Achievements: Participated in the UEFA Champions League for the first time in the club’s history during the 2020/21 season

Julien Stéphan was known for his tactical acumen and had previously led the team to win the Coupe de France in the 2018/19 season. However, he resigned from his position in March 2021, and Bruno Génésio took over as head coach.