Not quite as hardcore as the legendary Hypercourt but also an excellent choice!  
Great support and as always with K-Swiss, a slightly wider fit.   
 
Kids in correct footwear is VERY important.  The multi-directional aspect of tennis requires the ankle to have good support and a decent fit.  The parental habit of buying large to get the most usage is a bad idea on a tennis court!  Consider a tennis shoe as injury prevention as well as helping you play better.