Novak Djokovic overcame a troubled build-up and a nervy first set to defeat Tommy Paul and reach his 10th Australian Open final.
Stefanos Tsitsipas shrugged off a third-set wobble to wrap up a decisive victory over Karen Khachanov and reach his first Australian Open final.
Aryna Sabalenka will take on Elena Rybakina in a power battle in the final of the Australian Open.
Footage has emerged showing Novak Djokovic's father at a pro-Russian demonstration at the Australian Open on Wednesday.
Novak Djokovic equaled the record of former coach Andre Agassi with a 26th consecutive victory at the Australian Open to reach the semi-finals.
Billie Jean King called for Wimbledon to allow Russian and Belarusian players to compete at the All England Club this year as Aryna Sabalenka set up the possibility of an all-Belarus Australian Open final.