Kyle Edmund took Great Britain into the Davis Cup semi-finals with victory over Serbia's Dusan Lajovic in Belgrade.
Edmund, who also won Friday's opening singles match, won 6-3 6-4 7-6 (7-5) to give Britain an unassailable 3-1 lead.
Jamie Murray and Dom Inglot won Saturday's doubles match before Edmund sealed the win in two hours 34 minutes against the Serb world number 81.
Britain will now play Argentina at home in September as they aim to defend the title they won in Belgium last year.
Edmund, 21, was making just his second Davis Cup appearance and playing as Britain's top ranked singles player as Andy Murray chose to sit out the tie after he won Wimbledon.