Iga Swiatek was "scared" of a hostile reaction to her doping ban and says she does not expect an appeal by the World Anti-Doping Agency (WADA) after serving a one-month suspension.
Five-time major winner Swiatek, 23, tested positive for the heart medication trimetazidine (TMZ) in August, when she was world number one.
The International Tennis Integrity Agency (ITIA) accepted that the test result was caused by contamination and Swiatek's short suspension ended on 4 December.
Men's world number one Jannik Sinner did not receive a ban after failing two tests in March and WADA has appealed against that decision - but Swiatek said she does not see "any reason" for a similar outcome in her case.