Jannik Sinner could be in jeopardy following a World Anti-Doping Agency’s appeal against the decision to clear him of wrongdoing after he tested positive for a banned substance twice.

In August it was reported that Sinner had tested positive for low levels of a steroid called clostebol during the Indian Wells Masters in March, which entered his system via an over-the-counter spray applied by his now former trainer Giacomo Naldi.

Sinner was provisionally suspended at the time, but protested the decision and was allowed to continue playing.

An independent tribunal cleared Sinner of any wrongdoing but the World Anti-Doing Agency (WADA) believed the decision was incorrect “under the applicable rules” and Sinner should be banned for one or two years, hence their appeal.

This has been one of the biggest talking points in tennis and now Andy Roddick, one of the game’s most respected voices, has shared his thoughts on the matter.

The news first broke of Jannik Sinner’s doping case came on August 20, the day after he won the Cincinnati Open title.

The two-time Grand Slam winner was praised for his ability to stay focused on the tournament and win it despite knowing the news that was going to be made public the following day.

After being cleared of any wrongdoing, the World number one can be forgiven for thinking the worst was behind him, but that is not the case following WADA’s appeal.

As Sinner awaits results of WADA’s appeal, Roddick, who said he wouldn’t disagree if Sinner was suspended, took to his ‘Served’ podcast to share his views on the matter, and he did not hold back.

“There was no performance enhancement because it was in such small doses. It came off of his trainer’s finger, the trainer made a lot of mistakes but ultimately you are kind of responsible for your team around you,” Roddick said. “I was fine because I don’t think… my personal opinion, which hasn’t changed with this new WADA ruling.

“Them wanting a harsher penalty for negligence and responsibility, my opinion was basically Jannik Sinner, to put what is now going to be a hall of fame career at risk for no physical benefit, in my mind that would have made him the worst, dumbest doper that had ever lived. I don’t see a world where he would intentionally take on that amount of risk for no benefit.”

The news broke that WADA would be appealing the result of Sinner’s drugs case during his China Open campaign.

It was announced during his round of 16 match against Roman Safiullin, which he came from behind to win 3-6, 6-2, 6-3.

During his press conference, Sinner admitted he was surprised by the news. “Obviously I’m very disappointed and also surprised by this appeal because we had three hearings,” he said.

“All three hearings came out very positively for me. I knew about it a couple of days ago, that they were going to appeal, that today it’s going to go official.”