Conor needs perfect distance in order to land his left hand and really hurt someone. Khabib mostly circles out moves out of the way too fast to be threatened. Most of Conor's knockdowns, not clean one shot KOs, came from his opponents backing up too slowly and lining up in the perfect range where Conor gets full extension on his left. Conor won't hurt Khabib, someone who manages distance so well and sees the patterns where fighters tend not to strike. Check his fight against Horcher, who was a southpaw trying to aim his left. Khabib was simply out from the distance, out from range and patiently taking his time until he saw the opportunity to go for something. He has good awareness of the distances where a shot can hurt you and where it can't. Up close he is too upright and his head is level if not higher than Conor's, so there is no windup, the punches won't generate enough power because, not only they don't come at a good angle to generate power, but they won't have enough space. If Khabib decides to trudge forward from the initial one or two punches, Conor will have difficulty getting his hand in the right place to do anything significant. Maywheather started doing this, keeping very close to him and following him up close to deliver his short strikes. Thorough his career, the times Conor got hit was from such moments, and Conor got hit a lot(many such moments). Answer to BJJScout video of Conor's defense: Such defense works against short small guys, not athletically great guys, since it is the force of an arm trying to push downwards, and a bigger stronger guy can easily ignore the threat since the force generated by such a push is too small to be relevant. Rather, it will push Conor himself back and make him lean back, exposing his legs for the taking. Conor's another problem is if someone tries to clinch and getting underhooks rather than thrusting downwards, what would be quite an easy inside trip on his back leg. Conor has massive long arms for his body, he needs at all costs to keep distance because up close those hands are very ineffective, even the elbows are slow and clumsy. Wide flat back and small core sticks him on the ground like glue if he end there and has no leg support. Big quads and small hamstrings means he is rather well made for quickly pushing away from danger and long arms compliment his counters, but the weak hamstrings mean he lacks strength in thrusting forward, on the ground he needs considerable space before he gets his feet under him to push his hips away, rather than thrusting your hips up with hamstrings to shake off a mounted opponent or make the initial space from the bottom from where he could turn, get his feet on the ground, and push with his quads away. What is the best takedown on Conor? Considering the above, it's single legs, as he can't engage his hamstrings to great effect to drive his leg back when quads are isolated. Either drag him down opposite to the weight bearing leg, inside trip his one(last) leg, or pick him up and drop him opposite to the weighted leg(what Mendes did).