假设两个队比赛，罗马 vs 国际米兰 场地在罗马的话 那么，对于罗马队来说，就是主场，对于国际米兰队来说就是客场。 比赛场地在米兰的话，对于罗马队来说，就是客场，对于国际米兰队来说就是主场。 一般来讲，主场的话，那么主队的球迷会远远多于客队的球迷，所以在比赛中，加油的比例有很大的差别，给客队造成一种心理压力~~~~ 为了公平起见，就有双循环，主客场的比赛了。参考资料： 。com/question/12020794。html?si=2

Football is that one depths accept the athletic sports that people is fond of ,come from China ,are in vogue in Greece ,Rome in the Middle Ages.As for the whole world fan,every primary world cup for 4 years is looked at compose the festival being that one is grand,in South America ,Europe area,football motion level maximal,a lot of famous player comes from those area ,may force event happened in that fans team being that self holds out on in match cheers,but sometimes ,the match public security problem is paid close attention to fully.