Karolina Pliskova gave Naomi Osaka a reality check on her return to tournament tennis by rallying for a 3-6, 7-6(4), 6-4 victory in a high-quality second-round clash at the Brisbane International on Wednesday.

Aryna Sabalenka also reached the last-16, ramping up preparations for her Australian Open title defence with a 6-3, 6-0 win over Lucia Bronzetti. The Belarusian top seed will next face Danielle Collins or Zhu Lin.

Osaka had eased through her first tour match in 15 months on Monday after taking time out of the game to have a child but former world No.1 Pliskova proved an altogether tougher prospect.

The contest started well for four-time grand slam champion Osaka after she banged down five aces to lock up the opening set in 37 minutes against her rusty-looking opponent, who had received a bye through the first round.

Pliskova found her rhythm in the second set, however, and although Osaka’s rock solid serve repeatedly got her out of trouble until the tiebreak, she was unable to prevent the Czech from levelling up the contest.

An early break allowed Pliskova to get her nose in front in the deciding set and she saved three br­eak points in the next game to retain her advantage over her 26-year-old rival.

That was as close as Osaka got and Pliskova showed the quality of her own serve to ease into the third round and a clash with third seed Jelena Ostapenko.

Osaka said just being on the court was a “personal win” as she dealt with doubts a couple of weeks ago.

“These two matches I’ve had prove that I’m doing okay and the year is just going to get better for me.”