Alexander Zverev was furious with the umpire at the Laver Cup after a decision did not go his way in the singles match against Alex de Minaur.
Team Europe had got off to a brilliant start on day one, with Casper Ruud and Jakub Mensik picking up wins against Reilly Opelka and Alex Michelsen in the singles. Joao Fonseca became the youngest player to feature at the Laver Cup, and got Team World's first points on the board with a win over Flavio Cobolli.
Europe extended their lead back to two in the doubles, as the recently crowned US Open champion and world number one, Carlos Alcaraz, stepped onto the court for the first time, partnered with Jakub Mensik. It was a tight match between American number one Taylor Fritz and Michelsen, but they managed to get over the line to give them a 3-1 lea