After the Nuggets swept the regular-season series against their Northwest division rivals 3-0,the Jazz took a 3-1 series lead -- only for the Nuggets to tie the series.

这个是掘金和爵士战成3-3的新闻。我不明白最后一句，网站的翻译是：只是掘金追平了系列赛。

1. 这个for怎么翻译。

2. 追平了系列赛不应该是完成时态吗。为什么是to tie the series。