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MONTE-CARLO, MONACO - APRIL 16: David Goffin of Belgium serves against Steve Darcis of Belgium in their first round match on day one of the Monte Carlo Rolex Masters at Monte-Carlo Sporting Club on April 16, 2017 in Monte-Carlo, Monaco. (Photo by Clive Brunskill/Getty Images)

MONTE-CARLO, MONACO - APRIL 16:  David Goffin of Belgium serves against Steve Darcis of Belgium in their first round match on day one of the Monte Carlo Rolex Masters at Monte-Carlo Sporting Club on April 16, 2017 in Monte-Carlo, Monaco.  (Photo by Clive Brunskill/Getty Images)