private function _loadSlotsInfo(array $matchesIds)
    {
        $db = Db::obtain();
        $slots_query = 'SELECT * FROM ' . Db::realTablename('slots') . ' WHERE match_id IN (' . implode(
            ',',
            $matchesIds
        ) . ')';
        return $db->fetchArrayPDO($slots_query, array());
    }