What is lyon open 2023?

As an AI language model, I don't have the capability to provide future information about sport events. However, the Lyon Open is a professional men's tennis tournament that usually takes place in Lyon, France. It is a part of the ATP Tour 250 series and is played on indoor hard courts. The 2023 edition of the tournament might have some changes in the schedule and regulations, but you can find official information and updates on the ATP Tour website.