As the highest remaining seed in a high-quality draw in Brisbane after world No2 Rafael Nadal pulled out, Nishikori beat world No16, Daniil Medvedev, one of the brightest young prospects on the tennis scene, in a seesawing two hours, 6-4, 3-6, 6-2. The score was level at 4-4 in the third when Medvedev got the decisive break on a succession of unforced errors from the 2016 Brisbane champion.
Kei Nishikori's strong pre-Australian Open form has continued, the Japanese star demolishing world No.
The other semifinal match pits Frenchman Jeremy Chardy against Kei Nishikori of Japan.
Czech Republic's Karolina Pliskova celebrates winning her match against Australia's Ajla Tomljanovic.
De Minaur, who announced himself with a semi-final charge in Brisbane 12 months ago, ran and ran in the second set as Tsonga blazed away.
The former world number one shook off a frustrating first set loss, making a dramatic comeback in the second, and finally getting the better of a defiant Tsurenko who succumbed to an ankle injury in the final set which slowed her play.
Canadians held in China since arrest of Huawei executive
The advisory also warned of the "coercive" practice of exit bans, when authorities prevent people from leaving China. In Beijing, China's top prosecutor said Thursday that the two Canadians had "without a doubt" violated the law.
And that seemed to be borne out by the early exchanges, as Medvedev raced into an easy three-love lead in the first set, breaking the Nishikori serve at the first time of asking.
"It was a unusual match today, but the beginning of the sets was important".
"Despite (the) many chances that he had, I managed to hold my serves so I'm happy about it and I'm happy about the win", he said.
Nishikori and Medvedev split their two FedEx ATP Head2Head meetings, with the Russian winning their most recent contest previous year in the Tokyo final.
World No. 5 Osaka was beaten 6-2, 6-4 in 65 minutes by Latvia's Tsurenko, who comfortably broke her opponent's serve four times en route to the biggest final of her career.
Peter Gojowczyk beat Guido Pella 6-1 3-6 6-2 to set up a meeting with second seed Fabio Fognini in round two and Pablo Cuevas went down to 7-5 6-1 to Ugo Humbert.