Roger Federer’s former coach has given an insight into the tennis world’s inside thoughts

Roger Federer’s ex-coach gives inside view on Jannik Sinner doping saga

Ivan Ljubicic has shed light on the tennis world’s

The world No.1 twice tested positive for the banned substance clostebol in March of this year. He successfully appealed his provisional suspensions and was allowed to continue playing.

Earlier this month, an independent tribunal ruled that he “bore no fault or negligence” for the two anti-doping violations. And Ivan Ljubicic has now revealed what Sinner’s colleagues really think.