Can high schoolers really surround a fighter of Chan Sung Jung's caliber?

‌I feel like there would be a massive difference in footwork, distance management, and above all, aerobic capacity.
Even if we assume those four high schoolers have practiced coordinating their movements, wouldn't surrounding him be much harder than it looks?
If they aren't even coordinated, they'd probably all go down one by one from a single calf kick, a jab to the chin, or a liver blow..