See main article: 2021 Open Quimper Bretagne II.
This event was the second edition of the Open Quimper Bretagne in 2021 after the Open d'Orléans was delayed due to the COVID-19 pandemic in France.[1]
Sebastian Korda was the defending champion but withdrew before the tournament started due to injury. Brandon Nakashima won the title after defeating Bernabé Zapata Miralles 6–3, 6–4 in the final.