As in the 2017 edition, Roger Federer paired with Belinda Bencic to represent Switzerland at the Hopman Cup. In the group stage, Federer defeated Yūichi Sugita, Karen Khachanov and Jack Sock, from Japan, Russia and United States respectively, all in straight sets, to help Switzerland advance to the final. They proceeded to defeat Germany 2–1, with Federer beating Alexander Zverev in three sets before the mixed doubles decider, in which he and Bencic defeated the pairing of Zverev and Angelique Kerber. This was Federer's second and Switzerland's third Hopman Cup title overall.