prove mettle

prove your mettle

(slightly formal) also show your mettle
to show that you are brave and have a strong character As a reporter, she certainly proved her mettle working in the midst of a war zone.
See also: mettle, prove

prove/show your mettle

  (slightly formal)
to prove that you are good at doing something by succeeding in a difficult situation A relative newcomer to the game, he's certainly proved his mettle in the last two games.
See also: mettle, prove
References in periodicals archive ?
He has made peace with the fact that he hasn't been considered good enough by his former team Delhi Daredevils, and is now ready to prove mettle in a ' different colour.
officials put onus on U-23 squad to prove mettle in gulf cup semi-final against Qatar