I'm about 5'8" and 145 lbs. So most of the guys I end up sparring with are bigger. I was sparring this guy today who was about 6'0" and 175 lbs. I was successfully able to get inside and throw upper cuts and then clinch and knees. Clinch is where the problem came in, he would just grab and throw me to the floor regardless of how good the clinch was. anyone else face this?