Sport: Tennis

South Korean star Chung Hyeon ranked 58th in the world, will face unseeded American Tennys Sandgren for a place in the semi-finals.
Players from seven different countries will contest the boys’ singles and doubles in Tarbes, with South Africa represented by current world No 4 Alwande Sikhosana.
The Swiss second seed was too strong for the 80th-ranked Marton Fucsovics, winning 6-4, 7-6 (7/3), 6-2 in just over two hours on Rod Laver Arena.
Federer, rated the favourite to win his 20th major even at the venerable age of 36, progressed to the fourth round at the Australian Open for the 16th time.
The 2016 winner from Germany and 21st seed roared past the unseeded Russian 2008 champion 6-1, 6-3 in 64 minutes to reach the last 16.
The 16-time Grand Slam champion defeated the 28th seed Dzumhur 6-1, 6-3, 6-1 and will play Argentina's Diego Schwartzman next.
Bulgaria's world No.3 Grigor Dimitrov held on for a fluctuating 6-3, 4-6, 6-4, 6-4 win in just over three hours on Rod Laver Arena.
The 97th-ranked Tennys Sandgren downed ninth seeded Stan Wawrinka 6-2, 6-1, 6-4 and will next play Germany's Maximilian Marterer.
Six-time champion Novak Djokovic stretched his unbeaten record over Monfils to 15-0, one of the longest at Tour level.
The German 21st seed, champion here two years ago, will face 2008 winner Maria Sharapova in Saturday's glamour clash.
The world number one Spaniard's march towards a 17th Grand Slam crown was never threatened by Argentina's Leonardo Mayer.
The ageless Swiss marvel, rated as the favourite to win his 20th Grand Slam title, thrilled the Rod Laver Arena crowd with a virtuoso performance.
World number three, Garbine Muguruza took an hour and 24 minutes to quell the virtually unknown 21-year-old French world number 256.
The 12-times Grand Slam champion, seeded an unfamiliar 14, was too strong for American Donald Young.
Top seed Rafael Nadal clinically took apart the 81st-ranked Dominican to forge a 6-1, 6-1, 6-1 win in 94 minutes on Rod Laver Arena.
Kevin Anderson is the favourite to triumph in Monday’s ‘Battle of the Joburg-borns’ by virtue of his strong form in recent months.
In Thursday's draw, 36-year-old Roger Federer, bidding for a record 20th Grand Slam title, has a first round encounter with the 51st-ranked Bedene.
Williams, a 23-time Grand Slam champion, told Vogue she is determined to win more major titles and surpass the record of 24 Slams held by Australia's Margaret Court.
A week after retiring from the Brisbane International with cramps, leading Australian Open contender Garbine Muguruza had another early medical timeout for a thigh injury.
The Wimbledon champion accepted a wildcard into the tournament after retiring with leg cramps during her opening match at the Brisbane International last week.
World number one Rafael Nadal's knee injury hampered the end of his 2017 season and forced him to skip last week's Brisbane International.
Given a superb string of wins in the latter half of 2017, the 31-year-old Kevin Anderson has moved into an 11th spot.
Last week, Anderson lifted the Mubadala World Tennis Championship crown in Abu Dhabi in his final event for 2017.
The tournament's number one seed was due to play Frenchman Gael Monfils on Friday evening in Doha. Instead, wildcard Monfils proceeds straight to Saturday's final.
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