Bencic has competed at the Hopman Cup in January with Roger Federer for three consecutive years from 2017 through 2019. After finishing in second place in their round robin group to the eventual champions France in 2017, the pair won the tournament in each of the next two years. In 2018, they won all nine of their round robin rubbers to set up a final against the German team of Angelique Kerber and Alexander Zverev. After Federer defeated Zverev and Bencic lost to Kerber, the Swiss team won the decisive mixed doubles rubber in straight sets for the title. During the 2019 event, they were upset by the Greek team of Maria Sakkari and Stefanos Tsitsipas in their last round robin tie, but still advanced to the final through the tiebreak criteria. In a rematch of the previous year's final, Federer again beat Zverev while Kerber again defeated Bencic. The mixed doubles rubber was much closer than in 2018 and came down to a winner-take-all point in the third-set tiebreak as part of the Fast4 format. Federer served the point, which Switzerland won in a long rally to win their second consecutive Hopman Cup.