北京時間6月27日凌晨，巴西世界杯G組最后一輪美國對陣德國。美國隊雖然以0:1惜敗，但仍憑借凈勝球的優(yōu)勢力壓葡萄牙，與德國隊攜手從小組出線。

Portugal won its match against Ghana, 2-1. That ensured that both the U.S. and Portugal finished second in Group G -- also known as the "Group of Death -- with 4 points apiece. Enter the tie-breaker -- goal differential. The Americans and Portugal both scored 4 goals at the tournament after three games, but Portugal had given up 7 to the USA's 4.

葡萄牙2比1贏了加納。這樣死亡之組G組中美國和葡萄牙各積4分并列第二。現(xiàn)在就靠凈勝球數(shù)來打破平局了。美國和葡萄牙均有4個進球，但是葡萄牙的失球數(shù)是7個，而美國的失球數(shù)仍是4個。

所謂的“凈勝球數(shù)”（goal differential）就是一支球隊在一輪比賽中的進球數(shù)（goals scored）減去失球數(shù)（goals allowed）。比如，美國的進球數(shù)和失球數(shù)都是4，其凈勝球數(shù)就為0，而葡萄牙的進球數(shù)是4，而失球數(shù)是7，凈勝球數(shù)則為-3，由此得出，美國隊排在葡萄牙隊之前。

如果第一輪比賽后，兩隊積分相同，凈勝球數(shù)也相同，那么就只能靠“抽簽”（draw lots）來決定哪一隊出線了。