Two men kickboxing, the man in the red shorts is kicking while the man in the black is blocking.
Twee mannen kickboksen, de man in de rode broek schopt terwijl de man in het zwart blokkeert.
Two men are kickboxing each other.
Twee mannen kickboksen elkaar.
Two men kickboxing, were explicitly mentioned in both sentences.
Twee mannen kickboksen, werden expliciet vermeld in beide zinnen.