Day five of the Australian Open features more second-round action, with the likes of Carlos Alcaraz and Iga Swiatek taking to the courts.
The focus will be on the top half of the men's draw in Melbourne, with British aces Jack Draper and Cameron Norrie up against Tommy Paul and Giulio Zeppieri respectively.
Holger Rune and Alexander Zverev are also in action, while second seed Alcaraz's second-round opponent is Lorenzo Sonego.
As for the women's event, there is an eye-catching match on the cards between top seed Swiatek and American Danielle Collins, while last year's runner-up Elena Rybakina faces Anna Blinkova.
British number one woman Katie Boulter has a tough task on her hands as she takes on 12th seed Qinwen Zheng, while Emma Raducanu takes on another Chinese ace in Wang Yafan.
Arthur Fils to beat Tallon Griekspoor @ 8/13
Still only 19, Arthur Fils is one for the future on the ATP tour, but the Frenchman can make his mark against Tallon Griekspoor on Thursday.
Fils is threatening a breakthrough season this year, having already reached the quarter-finals of the Hong Kong Open and made the last four of the ASB Classic earlier this month.
That followed a run to the title match of the Next Gen ATP Finals in December, in which he was beaten in five sets by Hamad Medjedovic.
Fils showed great spirit in his first match at the Australian Open, recovering from a set down to beat Jiri Vesely, and he can claim the scalp of 28th seed Griekspoor.
The Dutchman has made the third round in Melbourne only once in his career and could be worth opposing after being pushed to five sets by Roman Safiullin in his opener down under.
Grigor Dimitrov to win 3-0 v Thanasi Kokkinakis @ 23/20
Grigor Dimitrov showed excellent stamina to see off the sprightly Marton Fucsovics in his first-round clash at the Australian Open, bouncing back from defeat in the first set to win 4-6 6-3 7-6 6-2, and the experienced Bulgarian can follow up with a comfortable win against home hopeful Thanasi Kokkinakis.
Dimitrov reached the last four in Melbourne back in 2017 and has already snapped his six-year trophy drought by claiming the Brisbane International title this month.
That title triumph involved a final win over Holger Rune, and he should ease to victory against his Australian counterpart, who has never made the third round and was made to work for his win in his opener against Sebastian Ofner.
Jelena Ostapenko to win 2-0 v Ajla Tomljanovic @ 8/13
Jelena Ostapenko is not considered a hard-court specialist, with her only previous Grand Slam title triumph coming at the French Open in 2017.
But the Latvian has been steadily improving on the harder surface, having made the quarter-finals at both the Australian Open and the US Open last year.
And she means business in Melbourne this month, having played through two events as preparation, including the Adelaide International, which she won after wins against Caroline Garcia, Ekaterina Alexandrova and Daria Kasatkina.
She was a 7-6 6-1 winner in her opening match against Kimberly Birrell and that was the fourth successive match which she won 2-0, so back her to win in straight sets against Ajla Tomljanovic in the second round.
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