What the Master said, I have done well. That is, I passed off the line with a good cover. And I find the player uncovered so that I can put the point to his face for certain. And with my left hand I want to try to send his sword to the ground.
Having beaten the attack aside as described by the master, you are now in Posta Fenestra. The structure of the player was unfortunately strong enough to resist your beat, and they still dominate the centreline.
Leading with your thumb, reach out with your left hand for a hooking block. Your wrist should sit in the angle formed by the players hand and the crossbar of the sword. As you roll your hand over the players wrist, the crossbar forms a small lever, twisting the sword offline to your left. Pull your left hand back so that your elbow locks into your hip. The blade of the sword will run down the length of your forearm. This is all done as a fast, smooth, circular motion. The player will probably still maintain their grip, but will be pulled off balance.
With the central line now wide open, thrust your sword straight into your opponents face.