Carlos Alcaraz suffered defeat on his Laver Cup debut, as he was beaten in straight sets alongside Alexander Zverev in doubles by Taylor Fritz and Ben Shelton. (More Tennis News)
Team Europe put up a strong fight but struggled to match Fritz and Shelton, who won 7-6 (7-5) 6-4 in one hour and 37 minutes.
Alcaraz and Zverev made a slow start to the match, losing their serve in the fourth game as the Americans went on a three-game winning streak, but they pulled it back to level the tie, only to lose the tie-break.
Team Europe looked to have found their groove in the second set but failed to convert four break points in the fourth game as Fritz and Shelton levelled the score at 2-2.
A three-game winning run at the end of the set, including one more break, was enough to get Team World over the line, pulling them back to 2-2 at the end of day one.
Francisco Cerundolo had originally given Team World the lead with a shock win over Casper Ruud before Stefanos Tsitsipas and Grigor Dimitrov's wins had put Team Europe 2-1 up.
