Top seed Roger Federer coasted into the second round of the Swiss Indoors Basel with a 6-1 6-3 win over Frances Tiafoe.
The world number two wasted little time asserting his authority over the 19-year-old American wildcard, breaking in the opening game before racing into a 4-0 lead.
Tiafoe regained some composure for the second set, which went with serve until Federer, who beat Rafael Nadal to win the Shanghai Rolex Masters and is chasing what would be the eighth title in his hometown, broke in game eight and closed out victory in just over an hour.
Tuesday’s late match saw second seed Marin Cilic progress against lucky loser Florian Mayer after the German retired at the start of the second set, trailing 6-3.
Earlier, third-seeded Belgian David Goffin beat Peter Gojowczyk of Germany 6-2 7-5 while Jack Sock, the American number five seed, came through in three sets 3-6 7-6 (9-7) 7-5 against Vasek Pospisil of Canada.