Britain's Murray and Brazilian Soares, winners in 2016, clinched a mammoth tie-break in the second set to beat the Czech-Argentine pair 6-4 7-6 (13-11).

The third seeds face all-British duo Luke Bambridge and Jonny O'Mara next.

Cameron Norrie and American Taylor Fritz, whom the Briton lost to in the singles first round, also advanced.

They beat Bosnia & Herzegovina's Mirza Basic and Damir Dzumhur 7-6 (9-7) 7-5 to set up a meeting with Jack Sock and Jackson Withrow.

Americans Sock and Withrow stunned second seeds and 2018 runners-up Juan Sebastian Cabal and Robert Farah of Colombia 6-7 (6-8) 6-3 6-4.

Britain's Ken and Neal Skupski also progressed, beating Australians James Duckworth and Jordan Thompson 6-3 6-4.

They will take on Finland's Henri Kontinen and Australian John Peers in the second round.

Meanwhile, Britain's Joe Salisbury also made it through alongside American Rajeev Ram, winning 6-0 6-4 against Argentine Guido Pella and Chile's Hans Podlipnik-Castillo.