Dan Evans was unable to give Great Britain a winning start to their Davis Cup Finals qualifier as he lost to Colombia's Nicolas Mejia in three sets.
The 253rd-ranked Mejia, accustomed to the challenging conditions in Bogota and strongly backed by the partisan home support, beat Evans 6-2 2-6 6-4.
Cameron Norrie will seek to level the best-of-five rubbers contest against Nicolas Barrientos later on Friday.
Ten-time winners GB are bidding to reach September's group stage.
More to follow.