Djokovic was on fire and raced to a 4-1 lead before converting a fifth break point to speed 5-1 clear and clinch the set in 39 minutes.
Novak Djokovic delivered a masterclass Wednesday to race into the Australian Open semi-finals and edge closer to a 22nd Grand Slam title with a straight-sets thrashing of Andrey Rublev.
The Serbian was in the zone to blitz past the Russian 6-1, 6-2, 6-4 on Rod Laver Arena and meets Tommy Paul for a place in Sunday's final.
The unseeded American Paul defeated countryman Ben Shelton 7-6 (8/6), 6-3, 5-7, 6-4.
"I cannot be happier with my tennis, honestly," said Djokovic, after reaching a 10th semi-final at Melbourne Park. Only Roger Federer (15) and Jack Crawford (11) have been there more often.
"I've been playing very solid from the back of the court and I really love playing in these conditions and this court," the 35-year-old told Rod Laver Arena.
"Some really close games that we had," he added. "Andrey is a great opponent, great player. I have tons of respect for him, one of the biggest forehands, quickest players on the tour.
"I knew what the game plan was and it was important that I found my best tennis."