Number + 球
球 (qiú) is a measure word (classifier) used to count goals scored or balls in sports contexts. While 个 is the most general classifier, 球 is specifically used when counting scores in ball games, such as 三球 (three goals). It reflects how Chinese uses specialized classifiers for different categories of objects.
上半场他一个人就进了两球。
Shàng bànchǎng tā yī gè rén jiù jìn le liǎng qiú.
He scored two goals by himself in the first half.
最后一分钟他踢进了关键的一球。
Zuìhòu yī fēnzhōng tā tī jìn le guānjiàn de yī qiú.
He scored the crucial goal in the last minute.
这场比赛的比分是三球比一球。
Zhè chǎng bǐsài de bǐfēn shì sān qiú bǐ yī qiú.
The score of this match was three goals to one.