S. Korea's Chung stuns Djokovic in Oz Open

Former world number one Novak Djokovic was knocked out of the Australian Open, going down in straight sets against South Korea's Chung Hyeon in the quarter-finals on Monday.

Twelve-time Grand Slam champion Djokovic lost 6-7 (4-7), 5-7, 6-7 (3-7) to Chung in a thrilling fourth-round clash at the Melbourne Park.

With this win, Chung is the first Korean player to reach the last eight of a Grand Slam.

The South Korean will now lock horns with relatively unknown player Tennys Sandgren who defeated No. 5-seeded Dominic Thiem of Austria for a place in the semi-finals.

Djokovic was playing his first Grand Slam after a six-month injury lay-off and was bidding to clinch his sixth Australian Open title.