Sabalenka extends streak with Australian Open 1st-round win

MELBOURNE, Australia (AP) — Aryna Sabalenka maintained her unbeaten start to the year when she defeated Tereza Martincova 6-1, 6-4 to reach the second round of the Australian Open. The fifth-seeded Sabalenka won the Adelaide International title in the first week of the year. She hit 29 winners to her opponent’s seven as she won her fifth consecutive match. Sabalenka will play American Shelby Rogers in the second round. Sabalenka has yet to make it past the fourth round at the Australian Open in five previous visits.