Day Six - Nitto ATP World Tour Finals

In This Photo: David Goffin, Dominic Thiem
Austria's Dominic Thiem (R) embraces Belgium's David Goffin after his defeat in their men's singles round-robin match on day six of the ATP World Tour Finals tennis tournament at the O2 Arena in London on November 17, 2017..David Goffin survived a shaky start to his ATP Finals shootout against friend Dominic Thiem on Friday to advance to the semi-finals, where he has the daunting task of taking on Roger Federer. / AFP PHOTO / Glyn KIRK
(Nov. 16, 2017 - Source: AFP)