David Goffin is a Belgian professional tennis player. His career-high singles ranking is world No. 7. He is the first Belgian man to be ranked in the top 10 and currently the No. 1 Belgian. Goffin has won six ATP titles and reached nine other finals, most notably at the 2017 ATP Finals.

Roger Federer is a Swiss former professional tennis player. Federer was ranked world No. 1 in singles by the Association of Tennis Professionals (ATP) for 310 weeks, including a record 237 consecutive weeks, and finished as the year-end No. 1 five times. He won 103 singles titles on the ATP Tour, the second most of all time, including 20 major men's singles titles and six year-end championships.