Simona Halep's former coach Darren Cahill has thrown his support behind the two-time grand champion whilst she serves a provisional suspension from tennis.
The Romanian tennis star tested positive for a banned substance - Roxadustat - at the US Open in August.
With an investigation into the test results pending, Cahill has jumped to the former world No. 1's defence in an Instagram post.
The Australian coach - who worked with Halep for six years and guided her to French Open glory in 2018 - wrote strongly about her character.
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"Firstly, and most importantly, there is NO chance Simona knowingly or purposely took any substance on the banned list. None. Zero," Cahill wrote.
"She is an athlete that stressed about anything prescribed to her by a medical professional (which was rarely), or about any supplement that she used or considered.
"Simona wore out the words 'please double check this, triple check this to make sure it’s legal, safe and permitted. If you are not sure, I’m not taking it.'"
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Halep - who is currently coached by Patrick Mouratoglou - was informed of her positive test on October 7 and requested an analysis of her B sample, which confirmed the initial finding from the A sample.
Roxadustat has been shown to make the body produce more EPO (erythropoietin), which is a natural hormone that athletes have previously used to improve performance.
In his public show of support for Halep, Cahill also lauded the 31-year-old's honesty.
"Simona’s integrity is faultless, she respects her peers, she loves the game and she always has her feet firmly planted on the ground as a humble, approachable champion," he wrote.
"I have sat proudly in awe of the person that she has matured into, watching the compassion she has shown others.
"I’m not talking about the stuff that the tennis world gets to see, I’m speaking about the kindness and care that very few are fortunate to experience. The kind of actions that are done for love and not for publicity.
"Honesty has always been her greatest strength and her biggest weakness.
"We would often laugh about the fact that she can’t act and can’t tell a little white lie.
"Ask her a question in a press conference and she will blurt out an honest answer.
"She wears her mood on her shoulder for the world to see, for good and for bad. That is Simo.
"What you see is what you get. She built an amazing career and legacy by doing things the hard way. The right way."
Novak Djokovic's breakaway player association has also backed the 2019 Wimbledon champion.
The Professional Tennis Players Association - which was founded by the Serbian star but has received opposition from the likes of Rafael Nadal and Roger Federer - released a statement shortly after Halep's announcement.
"The PTPA is committed to ensuring that Simona Halep, and every player, has a fair appeal and complete due process," the statement read.
"We will fight for her rights and look to advocate for fairness and transparency for all players."