Brisbane - Nick Kyrgios rebounded after dropping serve twice in the first set to reach the Brisbane International semi-finals 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 semi-final 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 semi-final. He'll play the winner of the later quarterfinal between Denis Istomin and Ryan Harrison.
"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 Raonic match), had more time to play, and was able to play my best tennis."
Results of matches played at the ATP/WTA Brisbane International tennis tournament at the Queensland Tennis Centre on Friday (X denotes seed):
Alex de Minaur (AUS) bt Michael Mmoh (USA) 6-4, 6-0
Nick Kyrgios (AUS X3) bt Alexandr Dolgopolov (UKR) 1-6, 6-3, 6-4
Ryan Harrison (USA) bt Denis Istomin (UZB) 7-6 (8/6), 4-2 rtd
Aliaksandra Sasnovich (BLR) bt Anastasija Sevastova (LAT X7) 7-6 (7/3), 6-4