请老师剖析句子

After winning their opening World Cup match to Colombia 2-1,Japanese fans got busy cleaning up their part of the stadium.

不是非常懂after引导的这句话，还有to在这里干什么成分？

After winning their opening World Cup match toColombia2-1, Japanese fans got busy cleaning up their part of the stadium.

After为介词，意思是“在……之后”，后接动词用动名词；句中的 to 表示对象。

句意：在以2-1赢了哥伦比亚的世界杯开局赛之后，日本球迷忙着清理他们坐在那看比赛的那部分体育场。

句子仿佛是新闻体，由于 winning 的逻辑主语与句子主语并不同。