TweetTennis ' greatest ever clay courter Rafa Nadal takes on Dominic Thiem in the last sixteen of the Monte Carlo Rolex Masters .
Dominic Thiem is a potential great on the surface himself .
TweetTennis ' greatest ever clay courter Rafa Nadal takes on Dominic Thiem , a potential great on the surface himself , in the last sixteen of the Monte Carlo Rolex Masters .