Nick Kyrgios dropped his serve twice in the first set but rebounded to reach the Brisbane International semifinals with a 1-6, 6-3, 6-4 win over former finalist Alexandr Dologolov on Friday.

The third-seeded Kyrgios had his left knee heavily taped but didn't appear to be hampered as he worked his way into the match after dropping the first set in 22 minutes.

In his first semifinal on home soil, Kyrgios will play either defending champion Grigor Dimitrov or Kyle Edmund for a spot in the final.

Teenage wild-card entry Alex De Minaur followed up his upset victory over Milos Raonic with a routine 6-4, 6-0 win over Michael Mmoh to reach his first tour-level semifinal. He'll play Ryan Harrison, who led 7-6 (6), 4-2 when Denis Istomin retired from their quarterfinal match with a hip strain.

"There were a lot of nerves coming into this match. It was a big opportunity for me," De Minaur said. "But I came in here a little more level-headed (than the Raonic match), had more time to play, and was able to play my best tennis."

Belarusian qualifier Aliaksandra Sasnovich reached her first tour-level final with a 7-6 (3), 6-4 semifinal win over seventh-seeded Anastasija Sevastova.

Sasnovich, who has a career-high ranking of No. 85, will meet either defending champion Karolina Pliskova or No. 3-seeded seed Elina Svitolina in the championship match.