Cilic will next face American Ryan Harrison, who beat Uruguay's 31st seed Pablo Cuevas 6-4 7-6(5) 6-4. TSONGA BATTLES PAST SHAPOVALOV IN MARATHON Former Australian Open finalist Jo-Wilfried Tsonga came back from 5-2 down in the final set to beat Canadian teenager Denis Shapovalov 3-6 6-3 1-6 7-6(4) 7-5 after three hours and 37 minutes of play. SVITOLINA SURVIVES SINIAKOVA SCARE Fourth seed Elina Svitolina came from a set down to beat Czech Katerina Siniakova 4-6 6-2 6-1 and book a spot in the third round. Ukrainian Svitolina will next face 15-year-old compatriot Marta Kostyuk, who beat Australian wildcard Olivia Rogowska 6-3 7-5. She is the youngest player to reach a grand slam third round since Mirjana Lucic-Baroni at the 1997 U.S. Open.
"It's a big pleasure to play here."A 6-1 7-5 6-2 win sees @cilic_marin advance to 3R: he'll face the winner of  Pablo #Cuevas and Ryan #Harrison. #AusOpen pic.twitter.com/T79nu1uFOn — #AusOpen (@AustralianOpen) January 17, 2018
https://t.co/OXs2ezTEeg — Express Sports (@IExpressSports) January 17, 2018"I remember being at that age. No pressure. Second round, creating history and all that," the 26-year-old Rogowska said. "She (Kostyuk) came out firing so credit to her. She's going to be a really good player." CARRENO BUSTA INTO ROUND THREE Pablo Carreno Busta, a U.S. Open semi-finalist last year, is the first player from the men's field through to the third round after the 10th seed's opponent, Gilles Simon, retires hurt while trailing 6-2 3-0.
PAVLYUCHENKOVA UPSET BY BONDARENKO Anastasia Pavlyuchenkova, the Russian 15th seed, has been knocked out by Ukraine's Kateryna Bondarenko in a 6-2 6-3 second round upset on Hisense Arena. "I am really happy, I don't really like playing first match but I guess it worked okay today," said the world number 94.
NO-LOOK WINNER! Pablo Carreno Busta produced an early contender for the shot of the year during his second-round victory over Gilles Simon at the Australian Open: https://t.co/W1dvPOFmNd #AusOpen pic.twitter.com/er3IhpQLRk— Sky Sports Tennis ? (@SkySportsTennis) January 17, 2018