Not sure what he is like now. When he was with us, his pace shut down many wingers. However he would sometimes be drawn to the winger and the ball between him and the CB would catch him out. He usually got back with his pace but it could lead to dangerous situations.
1 on 1 defending he is good, decent tackler and when he wins it he usually carries it far up the pitch with his running.
A big weakness would be back post headers. Positionally he's usually there , but he is very small so his best bet a lot of the time is to put the attacker off as he isn't winning the header.