Potts was knocked unconscious in the incident and underwent treatment and a series of scans in hospital but nothing serious was detected.
"We can confirm that Dan Potts has now left hospital and will be spending the next few days resting," read a West Ham statement.
"The young defender said: "A big thank you to everyone for their support and messages. Hopefully I am looking forward to feeling better over the next few days."
"There will be a period of rest for Potts before he is allowed to start light work back in the gym.
"West Ham would like to thank the London Ambulance Service, the on-site pitch rescue team and everyone at Arsenal who helped in making sure Potts was taken to hospital as quickly as possible."