Djokovic and Nadal face threat as Dominic Thiem joins Stan Wawrinka in injury comeback
Novak Djokovic and Rafael Nadal will face an extra challenge in the upcoming clay-court season with two of their old rivals returning from injury. Three-time Grand Slam champion Stan Wawrinka has already confirmed his participation in next week's Marbella Challenger and now 2020 US Open winner Dominic Thiem will be joining him in his own comeback.


