And beating Darcis on clay isn't impressive?
Look, I'm not saying he's a world beater on clay, but he's more than capable of holding his own. FWIW, he was robbed today in the first set tie-break.
He can hold his own against mediocre Challenger-level players. Darcis is in terrible form at the moment, but in normal form would hand De Schepper a loss in straight sets.
On faster surfaces De Schepper is an upper-echelon Challenger player. On clay all his weaknesses are exposed.