Defending champions Team World won all four matches against Team Europe to dominate day one of the Laver Cup.
Ben Shelton, Francisco Cerundolo and Felix Auger-Aliassime all triumphed in their singles matches in Vancouver.
Frances Tiafoe and Tommy Paul then completed a clean sweep in the doubles for Team World.
The three-day team tournament is viewed as tennis's answer to golf's Ryder Cup but is missing the likes of Roger Federer, Rafa Nadal and Novak Djokovic.
The first team to reach 13 points will lift the trophy. Matches on day one were each worth one point (meaning Team World are 4-0 up), with two points on offer for each victory on Saturday and three points for each win on the final day.