He can play RB but that's not where he prefers. He did play RB at Truident and Bologna whenever necessary but not comfortable at it. It's like Mustafi and Sokratis can play RB in emergency situation. RCB would be perfect for him though in a 3 because he is good on the ball
I rate him as the best CB in Asia and he has been a revelation since breaking through 3 years ago. Very strong in the air, brave in challenges and calm under pressure on the ball. Passes well.