MELBOURNE, AUSTRALIA - JANUARY 09: David Goffin of Belgium plays a forehand in the 2018 Kooyong Classic at Kooyong on January 9, 2018 in Melbourne, Australia. (Photo by Daniel Pockett/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 09: David Goffin of Belgium plays a forehand in the 2018 Kooyong Classic at Kooyong on January 9, 2018 in Melbourne, Australia. (Photo by Daniel Pockett/Getty Images)