Son, 35th in the world, had lost in the quarter-finals for his first tournament of the season in Hong Kong a week earlier, against world No.5 Andrey Rublev.
The 19-year-old Frenchman, who now works with Sébastien Grosjean and Sergi Bruguera, will play the Australian Open for the first time in his young career. He must face in the first round the thirty-year-old Czech Jiri Vesely, ex-top 40 who has fallen to around 300th place in the world.
In Auckland, the final will pit Tabilo against the Japanese Taro Daniel, who defeated the young American Ben Shelton 7-5, 7-6 (11/9).
