private function checkForm($form, MatchForm $matchForm)
 {
     if (!$form->isValid()) {
         return false;
     }
     if ($matchForm->getTeamA() == null) {
         $form->addError(new FormError($this->get('translator')->trans('FORM.MATCH.NOHOMETEAM', array(), 'admin')));
     }
     if ($matchForm->getTeamB() == null) {
         $form->addError(new FormError($this->get('translator')->trans('FORM.MATCH.NOAWAYTEAM', array(), 'admin')));
     } elseif ($matchForm->getTeamA() == $matchForm->getTeamB()) {
         $form->addError(new FormError($this->get('translator')->trans('FORM.MATCH.SAMETEAM', array(), 'admin')));
     }
     return $form->isValid();
 }