take up the gauntlet
US /teɪk ʌp ðə ˈɡɔːnt.lət/
UK /teɪk ʌp ðə ˈɡɔːnt.lət/

1.
to accept a challenge or a dare
:
•
When his rival challenged him to a debate, he readily took up the gauntlet.
•
The company decided to take up the gauntlet and develop a new product to compete with the market leader.