keep cards close to chest

keep/play your cards close to your chest

to not tell anyone what you plan to do I never know what Martin's next move will be. He plays his cards close to his chest.

Name	Pronounced	Usage
Justina	jus-TEE-nə (English)	English, Slovene, Czech, Lithuanian, Late Roman
Bazyli	bah-ZI-lee	Polish (Rare)
Rodolphe	-	French
Inderjeet	-	Indian (Sikh)
Hafsa	-	Arabic
Morcant	-	Ancient Celtic