There's an interesting story about an altercation between Bruce Lee and Gene LeBell, a Judoka, on a movie set. Allegedly, Bruce Lee was subdued and couldn't do anything to Gene. I believe he started to learn grappling from that point on.Lee Shailong, granted he modified the style of fighting by incorporating a multitude of fighting skills from other sports in then developing Jeet Kune Do, with karate and boxing influence. When Kimura, a prolific karate fighter first fought Lee, Kimura won from the go, but then the 2nd, and the 3rd, it was an easy picking for Lee.