Thorstvedt is convinced the Norway international is taking his game to a new level this season.
“He has such faith in himself and that’s good. It’s simply beautiful,” he told TV2.
King now has 35 Premier League goals, which makes him the fifth highest Norwegian scorer in the Premier League.
Ole Gunnar Solskjær (91 goals) is No1, followed by Steffen Iversen (40), Tore André Flo and John Carew (both 38). Copenhagen coach Stale Solbakken has said of King this season: “If he scores 15 goals in the Premier League this season and is to be bought by another English club, I think soon someone can buy for about £20m.