Andy Murray fell to a first defeat since starting his comeback in doubles in the first round of the Nature Valley International at Eastbourne.
Murray and his Brazilian partner Marcelo Melo lost 6-2 6-4 to Colombian top seeds Robert Farah and Juan Sebastian Cabal.
The Briton struggled on serve, being broken three times out of four.
Murray had won the doubles alongside Feliciano Lopez at Queen's last week in his first tournament since hip surgery.
More to follow.