fly solo
verb1
Idiomatic To do something without aid or supervision.
- Playing with freedom and no fear, Ashleigh Barty has powered into the Australian Open third round without even a coach. Barty clubbed China’s Yafan Wang 6-2, 6-3 on Wednesday before revealing she had been largely flying solo during her charge to the last 32 for only the second time.2019 January 16, “Ashleigh Barty loses coach but wins latest Australian Open encounter”, in The Guardian: