The ICC ranking system has not as yet have the last ODI played and thepositions of both De Kock and Malan would change after that match is taken into account.
Test ranking in the world - 9
ODI ranking - 13
T20I rating - 13
This whenhe went through a slump for a few matches this year. Does not look as if he is as bad as Mozart makes him out to be. His ODI rating is bound to go up soon aand so would his T20I rating.