Miami, FL, United States, 23 March 2019 | tennis.com.au

Ajla Tomljanovic has scored her biggest win of 2019, ousting No.9 seed Aryna Sabalenka to reach the third round of the Miami Open.

Tomljanovic beat the Belarusian 6-3 6-4 to score her first top-10 win since 2014, when she defeated Agnieszka Radwanska en route to the fourth round at Roland Garros.

It's a straight-sets win for @Ajlatom !

Beats Sabalenka 6-3, 6-4!#miamiopen pic.twitter.com/EiuAmYga4q

— WTA (@WTA) March 22, 2019

Tomljanovic joins countrywomen Ash Barty and Sam Stosur in the last 32; Barty and Stosur won their second-round matches on Thursday in Miami and will go head-to-head for a place in the last 16.

Tomljanovic next plays Anett Kontaveit after the No.21 seed beat Amanda Anisimova, 6-4 in the third set.

Later on Friday, 27th seed Nick Kyrgios opened his Miami account with a straight-sets win over Kazakh qualifier Alexander Bublik.

Kyrgios’ 7-5 6-3 win sets up a meeting in the third round with Serbian Dusan Lajovic, who upset No.5 seed Kei Nishikori in three sets.

Kyrgios to Bublik at the net. "Good match, mate. You are one of my favorite players on tour".

— José Morgado (@josemorgado) March 22, 2019

“Today I did well and hopefully I continue during the tournament as well,” Kyrgios told Tennis Channel.

Kyrgios now owns an impressive 11-3 record across four visits to Miami.

John Millman, the No.32 seed, was unable to progress to the third round with Kyrgios.

The Queenslander lead Federico Delbonis 5-3 in the final set before eventually going down 7-5 3-6 7-6(2).

Bernard Tomic fell to No.1 Novak Djokovic in a night match on Stadium court.

The Australian broke serve in the fifth game and had two game points to consolidate that break for a 4-2 lead, only for Djokovic to break back.

The top seed dominated the ensuing tiebreak before running away with a 7-6(2) 6-2 victory.

He next faces Delbonis.