He's a tough cookie (shortbread)
Ruthless Murray means business as he successfully defends title
Andy Murray defended his Qatar Open title with a devastating straight-sets destruction of Andy Roddick last night.
It was merely another exhibition of the ruthlessness that is earning the British No 1 a reputation around the world.
Beyond the sharpness and variety of his game that offers an opponent no shelter on a tennis court, there is a young man with a cold, calculating mind.
Murray is merciless - he dispatched Roddick 6-4, 6-2 to add the American to an impressive list of scalps this year that already includes world No 1 and No 2, Rafael Nadal and Roger Federer.
But off the court, the growing body count of those discarded on his rise to the top testifies even more to his determination to accept nothing but the best.
Before he left Britain 13 days ago, Murray dispensed with his manager, Patricio Apey, who will be replaced on March 1 by Simon Fuller, the man behind David Beckham, the Spice Girls and Pop Idol.
'When it's come to coaches, or whatever, I have to treat it like a business,' said Murray, who shrugged off any fears that a back injury would prevent him taking part in the final.
'Although they are your friends, if you feel you need something to be done better, or think things can be improved, you have to take the necessary steps or action. I think that's what has helped me.
'When I feel like something is not going right I'll have a think about it, I'll try to improve it, and if it's not getting better I'll make the change. If you let it linger on for three or four months, it's not good for anyone.
'Leaving Patricio was a tough decision; kind of like the one I made over Mark Petchey. I'd done very well with Mark, but I just thought I needed a change.
'Patricio had done a good job for me. I've got some good sponsors and everything had been handled well. But I just think I needed to move on to a bigger company that is a bit more global.'
At 21, Murray is changing management companies for a third time, having split from Octagon and Apey's Ace Group, and sacked two coaches, Petchey and American Brad Gilbert.
The latter was midway through a £750,000 year, three-year contract bankrolled by the Lawn Tennis Association.
Through it all, he has risen to No 4 in the world - and inspired the belief that he will be the first British man to win a Grand Slam title since Fred Perry 73 years ago, possibly in Australia.
He will certainly go Down Under in good heart after his win over Roddick. He broke him in the fifth game of the first set and was subsequently barely troubled by an opponent trying to regain the form that won him the US Open five years ago.
Fuller's interest in signing Murray manifested itself at the end of last year as Apey sought to renew his contract against stiff opposition from all the traditional tennis agents.
'The opportunity to work with someone like Simon doesn't come around too often,' said Murray.
'I sat down with him a couple of times and his ideas were different to the typical agent's point of view on things.
'It was more entrepreneurial. It wasn't just about the short term. It was about what's going on long term.
'Simon's worth hundreds of millions of pounds and it's not like 10 per cent of my clothing deal is making a huge difference to him! Simon wasn't talking about this year, or next. He spoke of five, six, seven years' time and no one else was talking like that with me. I liked that - it was different.'
Fuller, who masterminded Beckham's £125million deal with LA Galaxy, has contracted an entirely different personality with the signature of Murray.
Beckham is a worldwide brand - but that is not an attractive proposition to Britain's No 1 tennis player, a man allergic to the razzmatazz of life on a red carpet.
Murray said: 'I don't think I will be doing the same sort of thing as David Beckham has been doing - for one thing I definitely don't look like him! What Beckham has done with his game and his image is incredible, but it's not so much about that with me.
'I have my idea of the message that I would like to get across and need to find the best way of going about that. I think I'm a very hard-working professional. I do what I do on the court well, but just because I'm not sort of laughing and giggling when I play, it doesn't mean I can't be a good person.'
Last week in Doha, Murray celebrated his first year with coach Miles Maclagan and fitness coaches Jez Green and Matty Little.
His long-term girlfriend, Kim Sears, was also there, but she will return to university in Sussex this week, while Murray's physiotherapist Andy Ireland will join him in Australia.
'I like the guys around me and it's working,' said Murray. 'Everyone was saying it was a mistake when I did it. But I like having people around me who are good fun and keep me relaxed and who are professional and do their job very well.
'The second half of last year was awesome. I'd like to try to have a whole year like that, consistently winning matches against the top players and doing well in the Slams. The more chances you give yourself in a Slam the more chances you can go on to win one. I think I am getting closer.'
He added: 'What's exciting for me is that I still think I can play better than this,' said the Scot, who's back was heavily bruised after receiving treatment to relieve stiffness induced by a rubbery court surface and cool temperatures.
But he has no fears of being prevented from appearing at Melbourne Park.
His physiotherapist, Andy Ireland, will meet up with him on Wednesday and Murray said: 'I'll be fine.'
Roddick, like Federer 24 hours earlier, looked a dispirited man after sharing the court with Murray and afterwards he admitted: 'Andy played great. He's probably in the top form in the world right now. It's not a matter of if Andy will win a major, but a matter of when.'