Jannik Sinner’s decision to reappoint Umberto Ferrara as his fitness coach raises major questions about judgment and principles. It gives conflicting messages about responsibility and trust when the world’s No.

Jannik Sinner has rehired Umberto Ferrara, the fitness coach who purchased the healing spray at the center of his doping case.

The move comes after Jannik Sinner recently removed fitness coach Marco Panichi and physiotherapist Ulises Badio from his team.