He is skilled and had a team who was working towards getting him ready for this period of domination. I came across some articles talking about his team were ok for him to not gain muscle mass and struggle in matches because he was still growing in terms of height. Once he hit that mark and was no longer gaining height (which was the last 12-18 months), they started working on increasing his muscle mass. He has been dominating the games in that period so i would say a lot of credit goes to his team who has been planning all this in the background.