Despite taking one hour and 45 minutes in the heat of the Californian desert to beat the big-hitting Czech in three sets on Saturday, the Scot felt it necessary to head back out immediately to practise.
It is a clear indication that Murray is feeling no ill-effects as he takes part in the first Masters 1000 event of the year, as does the relatively short time it took him to turn up for his post-match media duties.
"I certainly wouldn't be in here [the interview room] this quickly," said Murray. "I went out to hit some balls after my match too, which I would not have done six months ago because I would have been sore. I'm feeling much better."
Murray was also competing in the doubles with Yorkshire's Jonathan Marray, who won the 2012 Wimbledon men's doubles title, but they lost 7-6 (7-1), 6-3 last night to Alexander Peya, of Austria, and Brazil's Bruno Soares in the second round.
"I'm waking up not sore, which is nice," said Murray. "Practice isn't compromised because I can barely move; that's the biggest thing for me just now. I feel like I can play each day and not worry about it."
Murray will play for the fourth successive day today when he takes on 20-year-old Czech Jiri Vesely, a former junior world No.1 who has made steady progress to his present career-high ranking of 77.
While Murray is focused on one match at a time, many are already looking forward to a long-awaited potential encounter with world No.1 Rafael Nadal in the quarter-finals. Despite the pair having claimed four of the last six grand slams, they have not played one another since October 2011. Reaching the last eight at least would represent a successful week for Murray. Currently world No.6, it would ensure he defends his ranking points from last year, as well as offering the chance of a thorough test against the reigning champion.
Murray's older brother Jamie made an unsuccessful return from a pelvic injury as he and his Australian partner John Peers lost to the Frenchmen Julien Benneteau and Edouard Roger-Vasselin 6-3, 4-6, 10-5 in the first round on Saturday. Colin Fleming and Ross Hutchins yesterday beat Jean-Julien Rojer, of Netherlands Antilles, and Romania's Horia Tecau 5-7, 7-6 (7-4), 10-8.