SAN DIEGO: Andy Murray beat Sam Querrey in four sets on Sunday (Monday in Manila) to send Great Britain into the quarter-finals of the Davis Cup for the first time since 1986. Wimbledon champion Murray posted his second singles victory of the tie, downing Querrey 7-6 (7/5), 6-7 (3/7), 6-1, 6-3 to capture the needed third point in a 3-1 victory in the best-of-five match tie. Britain had seized a commanding 2-0 lead on the opening day on Friday as 175th-ranked James Ward pulled off a remarkable comeback win over Querrey. Ward won 10 of the last 11 games to grab the five-set triumph, after Murray had crushed Davis Cup newcomer Donald Young in straight sets. Young was a late replacement in the US squad for injured John Isner.