look to your laurels
US /lʊk tu jʊər ˈlɔːrəlz/
UK /lʊk tu jʊər ˈlɔːrəlz/

1.
cuidar tus laureles, no dormirse en los laureles
to be careful to maintain your position or success, as someone else is trying to achieve the same or do better
:
•
The new intern is very ambitious; you'd better look to your laurels.
El nuevo pasante es muy ambicioso; será mejor que cuides tus laureles.
•
With so many talented young players coming up, the veterans need to look to their laurels.
Con tantos jóvenes jugadores talentosos surgiendo, los veteranos necesitan cuidar sus laureles.