WATCH: Venus Williams rolls back the years to book last-four spot at Australian Open

"I want to go further, I'm not happy with this, but I'm so happy to be in a position to go further."

Venus Williams posted another triumph for the old guard at the Australian Open by beating Anastasia Pavlyuchenkova to reach her 21st grand slam semi-final.

Williams, at 36, is the oldest singles player in the women's draw at Melbourne Park but she rolled back the years on Rod Laver Arena to beat 24th seed Pavlyuchenkova 6-4 7-6 (7/3).