Donna Vekic felt she played one of the best matches of her career as she routed 2018 finalist Aliaksandra Sasnovich at the Brisbane International to set up a semi-final meeting with Karolina Pliskova.

World number 34 Vekic needed just 56 minutes to thump Sasnovich 6-2 6-0 and reach the second Premier semi-final of her career.

"It was one of the most perfect matches I've ever played in my career. Everything was going well for me," said the 22-year-old Croatian.

However, Vekic is likely to face a stiff test in the last four against Pliskova, who won this event in 2017 and looked in fine form as she came through a topsy-turvy clash with Ajla Tomljanovic.

Pliskova hit 14 aces and 27 winners in a 6-1 1-6 6-1 victory and made only 16 unforced errors.

"It was a very strange match, but the beginning of the sets was very important," said the fifth seed.

"I've never had a match like this, but I'm just happy that I'm back in the semi-finals."

Pliskova and Vekic will meet on Saturday, with Naomi Osaka facing Lesia Tsurenko in the other semi-final tie.