两虎相争

兩虎相爭
liǎnghǔxiāngzhēng
  1. lit. two tigers fighting (idiom)
  2. fig. fierce contest between evenly matched adversaries

CEDICT

比喻两强互相争斗。如：「两队实力相当，今晚冠亚军争夺战，是场两虎相争的比赛。」也作「两虎共斗」、「两虎相斗」。

重編國語辭典

Entry Composition

1 两 liǎng
  1. two
  2. both
  3. some
  4. a few
  5. tael, unit of weight equal to 50 grams (modern) or 1⁄16 of a catty 斤 jīn (old)
2 虎 hǔ tiger

classifier: 隻
3 相争 xiāngzhēng
  1. to vie against one another
  2. to fight each other
  3. mutual aggression

Containing this entry

两虎相争，必有一伤 liǎnghǔxiāngzhēng,bìyǒuyīshāng
  1. lit. if two tigers fight, one will get injured (idiom)
  2. fig. if you start a war, someone is bound to get hurt