Andy Murray says he hopes to "still be selected for the Davis Cup in the future" after he started Great Britain's match against Kazakhstan with a straight-set win in Glasgow.
Cameron Norrie lost 4-6 3-6 to Alexander Bublik later on Sunday.
Joe Salisbury and Neal Skupski are in doubles action on Sunday evening as GB search for their first Group D win.
They face Bublik and Nedovyesov in a decider with the tie level at 1-1.
Murray, who inspired GB to the Davis Cup title in 2015, said: "I love playing Davis Cup. It's different to anything we experience playing on the tour.