Karen KhachanovKhachanov, a 22-year-old Russian, started 2018 ranked 45th on this planet and enters the Australian Open because the No. 10 seed. He gave Rafael Nadal all he may maintain in a vastly entertaining four-set fit within the 3rd spherical of the USA Open, after which gained the Paris Masters by way of defeating 4 instantly top-10 warring parties: John Isner, Alexander Zverev, Dominic Thiem and top-ranked Novak Djokovic. Khachanov, who's 6-foot-Five, has an enormous serve and a Western forehand with an extended, flowing backswing that abruptly hurries up on the ball, giving the affect that he's a cracking whip. It makes the shot just about unimaginable to learn. Borna CoricCoric, 22, has now not gained a fit in 4 earlier journeys to the Australian Open, however he had an atypical 2018: achieving a career-high rating of 12th, defeating Roger Federer two times and, with Marin Cilic, main Croatia to its 2nd Davis Cup name. A left-hander by way of nature who performs right-handed, Coric is 6-2 with a sport that has advanced from a defensive, counterpunching taste to a extra competitive, opportunistic logo of tennis. He has evolved a excellent serve, and his go back of serve places huge force on his opponent. His two-handed backhand is regarded as some of the easiest within the sport. His forehand, as soon as a legal responsibility, is far stepped forward. Daniil MedvedevMedvedev, a 22-year-old Russian, rose from No. 65 to No. 16 on this planet in 2018 and attributes his ascent to a greater serve and extra keep watch over of his mood. He gained in Tokyo in October with dominant serving, losing only one set as he captured his 3rd excursion name. Remaining week, he reached the overall in Brisbane with wins over Andy Murray, Milos Raonic and Jo-Wilfried Tsonga, then misplaced in 3 units to a resurgent Kei Nishikori. A lanky 6-6, Medvedev does now not glance robust, however he hits the ball cleanly with highest timing and with nice conceal. He can serve bombs and in addition hit large serves with a spin that opens up the court docket for his 2nd shot. Aryna SabalenkaSabalenka, a 20-year-old from Belarus, opened her 2019 season with a stirring three-set victory over Alison Riske to win the Shenzhen Open. Sabalenka started 2018 ranked 73rd, however underneath the tutelage of Dmitry Tursunov, a former excursion participant, she has risen to No. 11 by way of harnessing her prodigious energy sport and staying in issues longer with stepped forward shot variety. Her step forward got here within the Cincinnati match in August, when she reached the semifinals with wins over Johanna Konta, Karolina Pliskova, Caroline Garcia and Madison Keys. She adopted that by way of successful the Connecticut Open in New Haven, after which scary Petra Kvitova to succeed in the fourth spherical at the USA Open. The 6-foot Sabalenka serves with energy and heavy spin, backing that up with a fearsome Western forehand. However what actually makes her a risk is the way in which she performs fearlessly within the large moments of an in depth fit.Ashleigh BartyBarty, a 22-year-old Australian, had a breakout season in 2018, successful her first Grand Slam doubles name at the USA Open (with CoCo Vandeweghe), and achieving a career-high singles rating of 15th. In Sydney final week, she disappointed international No. 1 Simona Halep in instantly units. Barty has a phenomenal all-court sport, the usage of her athleticism and wide selection of photographs to confound warring parties. Even though she is best Five-Five, Barty leads the WTA Excursion in 2nd serve issues gained, the usage of her heavy kick serve to tug the returner out of place after which attacking the primary ball together with her robust forehand. Along with her excellent volleys and overhead, Barty appears to assault the online, steadily coming near in the back of her one-handed slice backhand, which is regarded as the most efficient within the sport. Be expecting the Australian enthusiasts to show Barty\u2019s suits into rollicking occasions.Madison KeysKeys, a 23-year-old American who was once the runner-up to Sloane Stephens in singles on the 2017 United States Open, final yr reached the quarterfinals of the Australian Open, in addition to the semifinals of the French Open and the USA Open. However her different effects had been moderately lackluster, and he or she enters this week ranked 17th. Keys struggled to discover a trainer to exchange Lindsay Davenport, who stopped touring to spend extra time together with her circle of relatives. In December, Keys employed Jim Madrigal, who guided Tennys Sandgren on his run to the quarterfinals in Melbourne a yr in the past. At Five-10, Keys has some of the sport\u2019s easiest first serves, and he or she generates astonishing tempo together with her floor strokes. However she ranks best 27th on excursion in 2nd serve issues gained, at simply over 47 %. An development on this space may repay for Keys.