Murray, beaten by Dan Evans in their semi-final, said: 'I'm okay, it's just this week is by far the most I've done in seven months.
This is an exhibition tournament but the quality has been high and has given players competition practice while the professional tour is suspended because of the coronavirus pandemic.
Andy Murray came through in straight sets against James Ward to reach the semi-finals at the Battle of the Brits in Roehampton. This tournament is organized by his brother Jamie.More news: First Alert Forecast: Hot with occasional storms this week
At the changeover at the stop of the first set, his mentor Jamie Delgado mentioned: "He's played a fantastic established of tennis".
Murray lost to Evans in a super-tiebreaker during semifinal action on Friday evening and opted to not play on Sunday simply as a precaution (he cited shin issues).
Russell Fuller, BBC Sports tennis correspondent: "Dan Evans underlines why he's now the best in Britain, as he breaks Kyle Edmund six times to win the Battle of the Brits".
"I need more energy".More news: U.S. begins revoking Hong Kong's special status over row with China
"He did a lot good in the first set". I got a little lucky today but I'm just happy to come through.
Evans made an immediate impression by breaking Edmund in the opening game of the match and although he was immediately broken back, he continued to retain the ascendancy.
Andy Murray had a successful week at the Battle of the Brits, playing four matches in five days before losing to British number one and eventual victor Dan Evans in the semi-finals.
And in the final they carried on making it hard for themselves, losing the first set in 25 minutes without picking up a game before turning it around.More news: Barcelona midfielder Arthur agrees to Juventus switch
"It is unusual to be presenting on your own with the winners' trophy", claimed Murray, whose function is increasing funds for NHS Charities Jointly.