Chair umpire Gianluca Moscarella has been banned by the ATP as it investigates comments he made to a ball girl in Florence.
There could be a US Open final rematch in December.
The 18-year-old will work with the former coach of Justine Henin and Li Na.
Andreescu is the youngest to make the WTA Finals field in a decade.
The Serb has now logged more weeks at No.1 than all but two ATP players.
Hall of Famer has high praise for Daniil Medvedev.
The World No.1 will have to be at his best early in Tokyo.
