hold your own
US /hoʊld jʊər oʊn/
UK /hoʊld jʊər oʊn/

1.
manter-se firme, defender-se
to maintain one's position or capabilities in a challenging situation or against competition
:
•
Despite being the youngest player, she managed to hold her own against the veterans.
Apesar de ser a jogadora mais jovem, ela conseguiu manter-se firme contra os veteranos.
•
He can hold his own in any debate, no matter how challenging the topic.
Ele consegue manter-se firme em qualquer debate, por mais desafiador que seja o tópico.