Boxer vs Thaiboxer is a bad matchup under K-1 rules since the low kick can really hurt you if you're not able to block them. And I've never seen a boxer being able to do so..

of course the game is for the thai boxer to keep his guard up and launching non stop low kicks.

Other problems for boxer is the fighting distance, it seems to be easy, but I can tell you it's very HARD to change your fighting distance and to expose yourself to the kicks when you think you're safe at your usual distance.

Still, a good offensive boxer will always blow out a thai boxer if he can break the distance and put his gloves on the thai boxer.