List of ATP players who uses Leather Grip VS Synthetic

Does anyone know If Berdych uses Leather Grip underneath his overgrip or just a regular synthetic grip?
Also if you know players who use leather please just add here, same with synthetic . But out of all im most curious about Berdych

ones i can think of top of my head ---

Leather-
Fed
Djokovic
Gasquet
Anderson
Dimitrov
Denis Kudla (i know this because i have his frames)
Zverev?
Cilic
Wawrinka
Karlovic

Synthetic
well i really don't know too many except Nadal
Isner?
Ferrer


Also if...

List of ATP players who uses Leather Grip VS Synthetic