The injured player must forfeit all remaining playing time and will not be permitted to return to the game. If the referee calls a timeout due to an injury (before to the coach entering the field of play), the player may re-enter the game at the next available substitution. In addition, the FIFA Injury Report states that if the injured player requires medical attention, he or she should be removed from the field of play immediately. Injuries are common in soccer. The type of injury that a player sustains often determines how long they will be sidelined. Some common injuries in soccer include hamstring strains, ankle sprains, and knee problems. More severe injuries that require surgery or prolonged recovery times include fractures, tears, and ligament damage. Players can reduce their risk of injury by warming up properly and using proper technique when tackling, catching, and shooting balls. Sports psychologists also offer advice on training programs and rehabilitation methods that players can use to avoid injury. If you are injured during a match, signal the referee by raising your hand. Do not try to continue playing despite being injured because it is important for players to take rest breaks too. A substitute player will come on to the field for you if you are unable to continue.