Novak Djokovic and Andy Murray inspired their respective nations to wins over Kazakhstan and Japan respectively in the weekends Davis Cup action.
The world number one defeated Mikhail Kukushkin in a five set thriller early on Sunday before fellow countryman Viktor Troicki eased past Aleksandr Nedovyesov in straight sets to give Serbia an 3-2 win over Kazakhstan.
Murray kept Great Britain’s title defence alive when he won all three of his matches to help his nation to a 3-1 win over Japan.
The world number two outlasted Japanese superstar Kei Nishikori in a five-hour epic to send Britain into an unassailable 3-1 lead.
The result means Great Britain will face Serbia in the DavidS Cup quarter-finals from 15-17 July.
In other results, Argentina’s Leonardo Meyer starred in two singles wins to help them to a 3-2 win over Poland, while France demolished Canada 5-0 without dropping a set all weekend.
Italy proved too strong for a depleted Switzerland who were without Roger Federer and Stan Wawrinka as they lost 5-0.
Finally, despite two wins from David Goffin, 2015 finalists Belgium would fall 3-2 to Croatia while Tomas Berdych inspired the Czech Republic to a 3-2 win over Germany.
— Davis Cup (@DavisCup) March 6, 2016