Ronald Matarrita faces up to six months on the sidelines after undergoing ankle surgery for an injury he picked up during Costa Rica's win against Canada. Nicholas Markanich returns for selection following a concussion. Kenneth Vermeer is also ruled out due to a torn pectoral muscle, while new signing Sergio Santos is a doubt. Ozzie Alonso will be absent for the rest of the season after tearing his right ACL in the win over DC United. Atlanta have confirmed that Dylan Castanheira will also miss the rest of the season due to an Achilles issue. Brad Guzan ruptured his Achilles tendon against Cincinnati in April and is also out for the season. Ronald Hernandez and Brooks Lennon both miss out due to MCL injuries. Miles Robinson will also miss out due to an Achilles injury. Emerson Hyndman misses out after injuring his quad. Andrew Gutman returns after a quad injury.