He may have lifted his first trophy of 2015 after Novak Djokovic withdrew from the Mubadala World Tennis Championship final with illness but Andy Murray admitted there were also concerns over his own fitness.
There had been encouraging signs of early season form for Murray at the six-man exhibition event in Abu Dhabi this week which serves as the unofficial opener for the new tennis campaign.
It included a straight sets victory over Rafael Nadal in the semi-finals for what was his first win over a top-four player since triumphing in the Wimbledon final in 2013.
However there was to be no repeat of that Wimbledon final showdown against Djokovic with the world number one withdrawing before the match after suffering from a fever.
It handed Murray the title although the Scot, who is poised to continue his build-up to the Australian Open alongside Heather Watson at the Hopman Cup in Perth next week, revealed he had felt discomfort in his left shoulder during his semi-final match.
"I don't know exactly what happened. I've never had anything happen to my left shoulder before," he said. "It's pretty sore.
"I'm going to have an ultrasound scan to check and see if there's anything there or not then I'll see what happens after that."
© Sportsbeat 2015