Number + 局 + Noun
局 (jú) is a measure word used to count rounds, games, or matches in competitions and sports. It is commonly paired with numbers to specify which round or how many rounds of a game are being discussed.
我们打了三局乒乓球,他赢了两局。
Wǒmen dǎ le sān jú pīngpāngqiú, tā yíng le liǎng jú.
We played three games of table tennis, and he won two.
这局棋下得太精彩了,观众都站起来鼓掌。
Zhè jú qí xià de tài jīngcǎi le, guānzhòng dōu zhàn qǐlai gǔzhǎng.
This game of chess was so brilliant that the audience all stood up and applauded.
决赛一共五局,现在比分是二比一。
Juésài yígòng wǔ jú, xiànzài bǐfēn shì èr bǐ yī.
The final has five games in total; the score is now two to one.