ANDY Murray is favourite to win Wimbledon – and that’s according to Viktor Troicki, his opponent at the All England Club today.

Murray’s week has eased into a predictable routine of practice, sleep, practice and sleep, punctuated with updates of his increasingly popular Twitter page.

Meanwhile, world number 31 Troicki was playing down his own expectations ahead of his debut on centre court this afternoon.

He has played Murray twice before and has never won a set.

Indeed, in both those encounters he has won only seven games, losing 6-1, 6-0 at the Miami Masters in their last encounter.

It was a humbling experience that Murray will be keen to draw on.

“I don’t think that last match means anything – it was just a day when I didn’t serve good, I didn’t do anything good,” said Troicki.

“I don’t know what to expect on centre court.

I’m just going to be aggressive, play smart and give my best.

“If I play at my top level then I believe I can win but who knows. It’s going to be a great experience but he’s playing very well.

“He’s one of the best players in the world at the moment.

He and Federer are probably the favourites to win.”

Murray won’t admit it but he’d be lying if he said he wasn’t looking further down the draw towards opponents at the business end of these championships.

If he progresses beyond Troicki – and it would be the shock of the championship if he didn’t – then either Stanislas Wawrinka or Jesse Levine await.

After that he’s looking at Gilles Simon, Fernando Gonzalez, Victor Hanescu or Juan Carlos Ferrero in the quarterfinals.

Meanwhile, Murray was dishing out more forfeits to his backroom team last night – with personal trainer Jez Green again the butt of his humour.

Green might be a willing fall guy but the former kick boxer has played a major role in the transformation of Murray and his ascent up the world rankings.

Nicknamed Jezebel, he has helped the British number one gain nine pounds in muscle since last year’s Wimbledon.

Under Green’s sadistic eye, Murray’s workout now includes a yoga session in a room heated to 42C followed by an unremitting two-hour gym work out of weights and sprints.

He has also devised a highprotein 6000 calorie- a-day diet to ensure Murray has the energy to keep up the pace.

Despite all that Murray thrives in the company of his backroom staff but still admits life on tour can be tough.

“You do so much travelling that it is hard to keep in touch with friends,” he said.

“When Tim Henman and Greg Rusedski were playing I would often go to dinner with them and we’d practice together but I’m usually the only British player now.

“That is why I like having the guys to travel with each week but tennis can get pretty lonely.”

Elsewhere, Novak Djokovic, left, marched into the fourth round with an almost routine 6-4 6-4 6-4 victory over Mardy Fish on Centre Court.

Only a momentary lapse in the second set threatened to knock the Serbian off course, but he quickly recovered to set up a clash with Dudi Sela of Israel in the last 16.

Ivo Karlovic was proving that you don’t have to be pretty to be effective. It’s almost impossible to see his name in print without the preface of big-serving Croat and his game comes straight from the mould of Goran Ivanisevic.

He banged down 46 aces in a 7-6, 6-7, 7-6, 7-6 win over ninth seed Jo Wilfried Tsonga and will be a player no-one relishes facing next week.

“What can I say, he served well and that is it,” said the Frenchman.