Former world number one Angelique Kerber registered her eighth win in as many matches in 2018 with a 6-2 6-3 victory over Italian qualifier Camila Giorgi as the German advanced to the Sydney International final on Friday.
Italian Camila Giorgi continued her impressive run at the Sydney International by racing past Agnieszka Radwanska 6-1 6-2.
"I felt great yesterday; I felt like I played my best tennis probably all year".
Barty, ranked nineteenth, cruised past Barbora Strycova 6-3, 6-2, while 25th-ranked Gavrilova had direct passage to the last four when Spain's Wimbledon champion Garbine Muguruza withdrew after her win over Kiki Bertens with a thigh injury.
Kerber and Barty have split their two previous meetings past year with the Australian winning in Zhuhai, China, and the German winning in three sets in Brisbane last week. "I'm trying to be aggressive and play like I did the year before last".
Barty held just once in the first set but reversed the momentum in the second when she broke in the ninth game after Gavrilova double faulted twice, which prompted the 23-year-old to smash her racquet in frustration and earn a code violation. "I know what to expect".
"Being now in the semis again here, it's really a good feeling, especially that I had the goal, to have a lot of matches before going to Melbourne".
The 84th-ranked Medvedev came back from a set down to move within one win of what would be his maiden ATP title against rising Australian star Alex de Minaur.
In men's quarterfinals, fourth-seeded Fabio Fognini beat No. 5 Adrian Mannarino 6-7 (4), 7-6 (4), 6-2 and Daniil Medvedev defeated Paolo Lorenzi 6-3, 6-3.
"I'm very happy, first of all, because life on ATP Tour is not easy. I'm just motivated to do it".
Paire sent down 17 aces against the world No.25 to advance to his second semi-final in a week, after reaching the last four in India.