GLASGOW, Scotland: Bob and Mike Bryan kept the United States alive in its Davis Cup first-round tie against Britain, holding off a comeback by Jamie Murray and Dominic Inglot to win Saturday’s doubles in five sets.

The 6-3, 6-2, 3-6, 6-7 (8), 9-7 victory by the Californian brothers reduced the Americans’ deficit to 2-1, and took the World Group match to a third and final day.

It also ensured the Bryans — the most successful doubles partnership in the Open era — have never lost after being two sets up.

Britain is still the favorite to advance, with fifth-ranked Andy Murray expected to beat John Isner in the first of Sunday’s reverse singles. James Ward then plays Donald Young.

Serbia stormed into the Davis Cup quarterfinals by taking an unassailable 3-0 lead over Croatia as last-minute replacement Novak Djokovic teamed up with Nenad Zimonjic to win the doubles rubber on Saturday.

Djoovic, stamding in for Viktor Troicki, and Zimonjic convincingly defeated Croatia’s Franko Skugor and Marin Draganja 6-3, 6-4, 6-1 in under two hours.

“We wanted to finish the job today, to take advantage of the fact that we won the first singles and that was done,” Djokovic said.

Serbian coach Bogdan Obradovic had earlier explained he decided to rest Troicki after his three-hour victory over Croatian teenage sensation Borna Coric on Friday, when he fought back from two sets down.

France captain Arnaud Clement was delighted as his side qualified for the quarterfinals of the Davis Cup after taking an unassailable 3-0 lead over Germany in Frankfurt on Saturday.

After Gilles Simon and Gael Monfils beat Jan-Lennard Struff and Philipp Kohlschreiber respectively in Friday’s singles, the doubles pairing of Julien Benneteau and Nicolas Mahut strolled to a 6-4, 6-3, 6-2 victory over Benjamin Becker and Andre Begemann.

“It’s been the perfect weekend in terms of results and for the doubles pairing,” beamed Clement, whose side lost the 2014 final to Switzerland.

“Nico (Mahut) looked very strong in his first match.

Czech young guns Jiri Vesely and Adam Pavlasek kept the hosts’ Davis Cup hopes alive by beating Australian doubles pair Samuel Groth and Lleyton Hewitt in Saturday’s first-round tie.

In the eastern city of Ostrava, Vesely, 21, and Pavlasek, 20, reduced Australia’s lead to 2-1 after taking the doubles rubber 1-6, 7-6 (7/2), 3-6, 7-6 (7/4), 6-2 in three hours and 14 minutes.

“It’s fantastic what the boys showed against this hard-to-beat pair. We’re back in the game,” beamed Czech captain Jaroslav Navratil.

The big-serving Groth and former number one Hewitt swept the hosts in the first set and took a 3-0 lead in the second, but the Czechs managed to fight back for a tie-break win.

Playing his first Davis Cup rubber, Pavlasek, known in his country as the ex-boyfriend of Wimbledon champion Petra Kvitova, won his first serve only at the end of set two.