The coach will be blamed for not using the right strategy. But the players are also to blame because they don't give their best performance. Maybe the opponent is stronger than them so the opponent can win the match. But all will be blamed because they lost to the opponent. Usually, the coach will know if something wrong happens to his team and will use other strategies to prevent the bad. If they really lose in that match, they should introspect and search for the mistake so they can improve their performance for the next match. They need to search for the right strategy to beat the next opponent so no one will be blamed.