World number one Aryna Sabalenka, fresh from her Miami Open triumph on Saturday, credited her consistent form this season on mastering the temper which once plagued her performances.
Sabalenka added Miami to the title she won at Brisbane by beating American Jessica Pegula 7-5 6-2 at Hard Rock Stadium.
The Belarussian has also featured in the finals at the Australian Open and Indian Wells but showed her increasing maturity by handling a roller-coaster first set where she was broken three times by Pegula.
In the past, Sabalenka would react to a break of serve or moments of frustration with anger and sometimes loud displays of her annoyance with herself.