BELGRADE, Serbia — Kyle Edmund stepped into the role of Andy Murray and took titleholder Britain into the semifinals of the Davis Cup by beating Dusan Lajovic of Serbia in straight sets in the first of the reverse singles on Sunday.
Edmund’s 6-3, 6-4, 7-6 (5) win on a wet and windy day at the outdoor Tasmajdan clay-court stadium gave Britain an unassailable 3-1 lead in the best-of-five series.
Edmund also won his opening singles on Friday against Janko Tipsarevic as he assumed the role of Murray as the leader of the team.
Murray decided not to play a few days after his second Wimbledon title but cheered the team on from the sidelines.
Britain hosts Argentina in September in the semifinals.
Edmund had to save two set points in the third set before holding serve and he won despite falling behind 4-2 in the tiebreaker.
Lajovic sent a wild backhand way wide to give Edmund a match point and the Briton converted when Lajovic hit another backhand wide.
Edmund had broken serve for a 4-3 lead in the final sent but dropped his serve for the first time in the match in the 10th game.
Edmund had breezed through the first set, finishing it off with two straight aces in the drizzle.
But the light rain stopped at the start of the second, with Edmund breaking for 4-3 and closing it with a service winner.