[1] He briefly trained at the Mouratoglou Tennis Academy in France.

[2] Zakharov represented Russia in the 2016 Junior Davis Cup, in which he and teammates Alen Avidzba and Timofey Skatov won the title.

Partnering Avidzba, he won the deciding doubles match in the final against Canada, defeating Felix Auger-Aliassime and Chih Chi Huang in straight sets.

[4] In November 2023, he won the $15k event in Ipoh, his first title since his hiatus.

[6][7][8] He dated fellow tennis player Marta Kostyuk from 2019 to 2020.