世界杯波兰谁开球？
是波兰队。 2018年FIFA规则中关于开球的规定是这样写的： The kick-off is a direct free-kick and the player who kicks the ball must not be touching any other player or their clothing. It will count as one of the game’s four throws， but no goal can be scored directly from the throw-in. For both teams it may be taken on either their right or left throw-in side. Any team that touches the ball in its own half before it has crossed the halfway line loses possession， which becomes an indirect free-kick for the opposition. If this happens inside their own penalty area they also concede a penalty kick.
其中对开球的定义是a direct free-kick——直接任意球（注：间接任意球则是指被对方抢断后，该方球员需要再次通过踢球来将球踢入对方的球门）；规定开球人必须站在本方半场且不得与任何其他队员相撞或触球，否则将被判罚越位（注：此处的越位定义为“开球时开球队员在球未被其他队员触球前，已进入对方半场并处于越位位置”）。开球不能直接进球得分。 在上述规则的基础上，再来看2018年的这一案例： 比赛进行到第43分钟，德国队获得一个边线球机会。这时，主裁判哨声响起，示意德国队开球。随后，边裁举旗示意德国队的克罗斯越位了！原来，克罗斯在开球之前已经进入了波兰的防守半场，违反了国际足联的有关规定而被判越位。