Kazakhstan held firm for the opening 40 minutes, but braces from Kevin De Bruyne and former Manchester City team-mate Jeremy Doku ensured Belgium stayed unbeaten. 

Belgium's dominant start was rewarded three minutes before half-time when De Bruyne sent a wonderful curling shot from outside the area beyond Mukhamedjan Seysen. 

Doku doubled the Red Devils' lead just over a minute later after he collected De Bruyne's pass before cutting inside from the left and finishing with ease. 

Rangers midfielder Nicolas Raskin put the result beyond doubt six minutes after the restart, who scored from close range, before Doku grabbed his second of the encounter with a left-footed strike from a tight angle. 

Substitute Alexis Saelemaekers then set up De Bruyne to confidently score again, with Thomas Meunier adding further gloss to the scoreline with a curling shot from distance.