Tennis-Sinner re-appoints former fitness coach Ferrara

FILE PHOTO: Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 28, 2024 Italy's Jannik Sinner poses for a picture with the trophy and fitness coach Umberto Ferrara after winning the final against Russia's Daniil Medvedev REUTERS/Issei Kato/File Photo

LONDON (Reuters) -Wimbledon champion Jannik Sinner has re-appointed his former fitness coach Umberto Ferrara with immediate effect, the Italian world number one confirmed on Wednesday.

Sinner parted ways with Ferrara and physiotherapist Giacomo Naldi last year following the investigation into his positive tests for banned substance clostebol.