Kohli should still not be fending at a ball like that. Just drop your wrists, you are one of the best batsman in the world.
Gill got an unplayable ball. It moved in so much when previous balls pitched at the same spot were going comfortably away from the spot.
Just need to keep batting today, atleast till tea. Pitch is still good to bat on, and I don't expect that to change even on days 4 and 5.
Australia won't give follow on. They will want to bat 1½-2 sessions, score 250+ more runs and declare with almost 2 days left.