Dan Evans - who was given a 12-month ban after testing positive for cocaine in 2017 - said he thought Sinner was "lucky how quickly his case came forward".
“The question marks are how he got through that process so quick, when there’s normally a big backlog to get evidence on both sides, I remember with my own case how long it took - nothing was ever done very quick.
"I’m not sure that people are that happy that it’s a fair playing field on the ITIA’s process for all cases.
"We need transparency and fairness.”
US Open 2024: Jannik Sinner parts with physiotherapist and fitness coach
Jannik Sinner says he is no longer working with physiotherapist Giacomo Naldi and fitness trainer Umberto Ferrara following the investigation into his positive tests for a banned substance.
www.bbc.com
Sinner (just believe, never doubt):
"Here I also know who is my friend and who is not my friend, because my friends, they know that I would never do that."