Britain's Jack Draper says Jannik Sinner does not "deserve any hate" as the world number one prepares for his comeback from a three-month doping ban.
Draper is a long-time friend of Sinner and spent several days practising with the Italian in Monte Carlo last week.
Sinner, 23, was banned from the sport in February after reaching a settlement with the World Anti-Doping Agency (Wada) over two positive drugs tests last year.
The three-time major champion is able to return to competitive action from 6 May and plans to make his comeback at the Italian Open in Rome.