This is a little technique I got from Zendokai (a karate style) a few days ago which, I have... assimilated into myself.
As you know, when wrestlers go in for the takedown, they're usually hit by a kick before they got to hold their opponent.
What I saw from Zendokai however, was that when they went in for the takedown, they didn't enter straight. They'd go at a 45 degree angle away from their opponent. As you're about to pass, you can then jump on him and grab.
Try going in like that instead of straight in.
Just a little thing you could try.