Australian Open: USA's Frances Tiafoe thumped his chest in celebration after defeating Kevin Anderson. (AP Photo) HIGHLIGHTS Kevin Anderson won the first set but an arm issue slowed down his serve eventually Tiafoe equalled his best Grand Slam tournament performance by reaching the 3rd round Marin Cilic and Stefanos Tsitsipas won their respective matches Frances Tiafoe rolled up his sleeve, flexed and slapped his biceps muscle five times, thumped his chest and roared at the terraces to celebrate the biggest victory of his career, a 4-6, 6-4, 6-4, 7-5 comeback against two-time Grand Slam finalist and No.5 seed Kevin Anderson in the Australian Open's second round.

The 20-year-old Tiafoe trailed by a set and 3-0 in the second Wednesday before turning the match around as Anderson's big serve slowed down because of problems with his right arm. Anderson was repeatedly visited by a trainer during changeovers and he lost about 5 mph (8 kph) on his first serves as the match wore on.

Anderson was the runner-up at Wimbledon last year and at the U.S. Open in 2017 and had won all three previous matchups against the 39th-ranked Tiafoe.

"It means the world to me, I lost to Kevin three times last year. I would love to get to the second week of a Slam and if you guys get behind me like you did again, then it's going to be pretty easy for me," Tiafoe said.

BIG FOE @FTiafoe shocks 6 seed Kevin Anderson 4-6 6-4 6-4 7-5. #AusOpen pic.twitter.com/2AthQLrBY1

#AusOpen (@AustralianOpen) January 16, 2019 American Tiafoe, ranked 39 in the world, will play Italy's Andreas Seppi in the third round, which will at least equal his best performance at a Grand Slam tournament, having made the third round of Wimbledon last year.

MARIN CILIC FIGHTS OFF MACKENZIE MCDONALD

7-5 6-7(9) 6-4 6-4. @cilic_marin gets it done against a valiant Mackenzie McDonald. #AusOpen pic.twitter.com/PGZHkAuQth

#AusOpen (@AustralianOpen) January 16, 2019 Marin Cilic capped a 25-ace performance with a pair to serve out a second-round victory at the Australian Open, beating 81st-ranked Mackenzie McDonald of the U.S. 7-5, 6-7 (9), 6-4, 6-4.

Cilic was the runner-up here to Roger Federer last year and is seeded No. 6 this time.

Cilic hasn't lost at Melbourne Park to anyone ranked as low as McDonald since 2007.

20-YEAR-OLD TSITSIPAS BEAT VIKTOR TOICKI

. @StefTsitsipas the Great is through to Round 3

Def. Troicki 6-3 2-6 6-2 7-5. #AusOpen pic.twitter.com/StWMOz2Ved

#AusOpen (@AustralianOpen) January 16, 2019 Stefanos Tsitsipas is through to the third round and closer to a potential meeting with defending champion Roger Federer at Melbourne Park.

The Greek 20-year-old beat Viktor Troicki 6-3, 2-6, 6-2, 7-5 but wasted a lot of break-point opportunities as the Serbian player saved 15 of 19 chances created by Tsitsipas.

Considered one of the new breed of young talented players on the ATP Tour, Tsitsipas won at Stockholm last year and was a finalist in two other tournaments.

He will next play 19th-seeded Nikoloz Basilashvili, who beat Stefano Travaglie 6-3, 3-6, 6-3, 4-6, 6-3, also on Wednesday. Tsitsipas could play Federer in the fourth round.

Also Read | 17-year-old Anisimova reaches 3rd round, Stephens thumps Babos Also Read | Indian men's doubles challenge ends in Melbourne Also Read | Ivo Karlovic becomes oldest man in over 40 years to win a match at Australian Open Get real-time alerts and all the news on your phone with the all-new India Today app. Download from Post your comment