Singles wins for Andy Murray and Colin Fleming helped Great Britain complete a 5-0 whitewash over Hungary in their Davis Cup Group Two play-off.
Fleming and Ross Hutchins won Saturday's doubles in Glasgow to give GB an unassailable 3-0 lead in the tie.
But despite the win already being in the bag Murray decided to play in Sunday's first dead rubber against Gyorgy Balazs, winning 7-6 (7-3) 6-3.
Fleming then won his first Davis Cup singles match, 6-4 6-3 over Sebo Kiss.
Murray went a break down early in the second set and struggled to get going against his unranked opponent.
"I think it was the right thing to do and I wanted to try and play, but when I got out there I didn't feel great," he said.
"I'm just happy I won the match.
"I'm tired and my body's hurting. When you've already won it's, in a way, like a glorified practice match because you don't get anything extra for winning and right now I need to rest."
Murray, who will be back on court next week at the Thailand Open in Bangkok, has criticised the number of mandatory tournaments the players must compete in.
As well as the four grand slams and eight Masters 1000 events [Monte Carlo is no longer mandatory], players must also enter four other tournaments, while the ranking points are made up of results from 18 tournaments, so players will lose out if they play less.
Murray said: "The mandatory events is the worst thing. All you had to do originally was play in nine Masters Series and four slams, that was 13 events.
"I'm being quite open about it. Some of the smaller events, because the ATP's messed up the smaller tournaments by giving them 250 [ranking] points, it doesn't really make much sense to play in, because 250 points isn't going to make hardly any difference.
"But you get good guarantees for going so one or two times a year, it's nice to do that.
"When we play the Masters Series and the slams, we're playing against the best players in the world every time. Sometimes it's nice to go to a tournament when you don't have to kill yourself in every single match. You can gain some confidence from winning matches and maybe winning a tournament.
"The schedule's messed up and we need to change it."