Karolina Pliskova has won a third Brisbane International title in four years, beating American Madison Keys to break new ground at the season-opening event.

The Czech world No.2 on Sunday became the first man or women to win the event three times, Pliskova again serving without fear in a 6-4 4-6 7-5 tussle.

The two hour, seven-minute triumph follows a near three-hour semi-final victory on Saturday night over Naomi Osaka and comes after Brisbane titles in 2017 and 2019.