Daria Kasatkina in shock defeating her childhood hero Venus Williams

Young Russian tennis player Daria Kasatkina sent shockwaves through the ASB Classic tournament last night upsetting last year's champion Venus Williams 6-7, 6-3, 6-3.

The 18-year-old upset last year's champion Venus Williams in the first round of the ASB Classic. Source: 1 NEWS

The 18-year-old showed patience and great composure for her age to dump Williams out of the Auckland tournament in the first round.

"It was a big pleasure to play against Venus because she is a legend," said Kasatkina.

"When I was young it was a dream to play against her and now I beat her, it is something unbelievable for me."

Kasatkina credited her coach for her upset victory over the top seeded Williams.

"Without him (coach) maybe I would not win."

Daria Kasatkina celebrates her win over Venus Williams at the ASB Classic. Source: Photosport

Kasatkina seemed to have set high expectations of herself before the stunning upset over the top seeded Williams, hoping to round off 2016 with a promising ranking.

"My ambitions are very high now I want to be at least in the top 20 in 2016."

"It was an unbelievable atmosphere there was so many spectators; I was a little bit nervous.

"I like to play when there are a lot of people watching me,” she said.

Ranked 75th in the Women’s Tennis Rankings, no doubt the Russian will better her position after such a promising start in the ASB Classic.