Jamie Murray and his doubles partner Bruno Soares missed out on a first title of 2018 after losing in the final of the Qatar Open.
The top-seeded pair were beaten 2-6 6-7 (6-8) by second seeds Oliver Marach of Austria and Mate Vavic of Croatia.
Murray and Soares battled to find fluency in the opening set with the Brazilian struggling on his serve.
The pair tried to rally in the second set but their opponents proved too strong in the tie-break.
In the men's singles, French wildcard Gael Monfils advanced to the final after the top seed Dominic Thiem from Austria, withdrew ahead of their semi-final with a fever.