How to counter someone who is constantly crouching?

[Beasting102]

???????????

[Rockin']

Get him getting under a shot of yours (by throwing a jab or something) and then crack him with an uppercut. Step around him and bust him in his mid section. Then you throw more uppercuts...….Rockin'

[mxtali]

Jermell vs Lubin

[ShoulderRoll]

Uppercuts.

If he starts closing up his guard to stop those then he is now open to hooks.

[Blueboy3]

Good ol' Stiff jab to the chest can get him off balance to break his rhythm

[ThunderFists]

Uppercuts as he is crouching, set up hooks around the guard with a jab and if youre pretty experienced set up shots on top of the head