Jelena Jankovic has everything a young woman could want, but the Serbian world number one desires one more thing - a Grand Slam title.

The 23-year-old travels the world doing what she loves, has her own fashion range, a professional sportsman as a boyfriend and takes exotic holidays.

But Jankovic is determined to rid herself of the unwanted tag as the only Women's Tennis Association world number one never to have won a Grand Slam title and has begun preparations in earnest for the 2009 Australian Open, which begins in Melbourne on 19 January.

‘I'm training very hard, doing my best to get as fit as possible and I hope to be in the best shape ever for the Australian Open because my goal is to win it, it is my wish,’ she said.

After a short break - two weeks in Hawaii with boyfriend Mladjan Janovic, a Montenegrin water polo player she met at the Beijing Olympics - Jankovic resumed training at high altitude in Mexico at the end of November.

‘I had holidays, but they are over and now I start to get back to work,’ she added. ‘I started training two weeks ago in Mexico. The accent was on my fitness - I was doing a lot of running, a lot of endurance and a lot of hours in the gym.

‘Now I've arrived in Florida where I will be working on my tennis together with my fitness.’

Jankovic enjoyed a stunning end to 2008 to secure the number one ranking ahead of Serena Williams, Dinara Safina, Elena Dementieva and compatriot Ana Ivanovic.

After losing the US Open final - her first Grand Slam singles final - to Serena Williams, Jankovic won three successive tournaments, in Beijing, Stuttgart and Moscow, to propel herself to the top of the rankings for a second time, having occupied top spot for one week in August.

It was a position she would not relinquish, her consistent displays keeping her top of the pile at the end of the year with a record of 65 wins from 84 matches, which included four titles to take her career tally to nine.

‘After (Justine) Henin retired (in May), there was an opening for the number-one position and at a certain period of the year we were all fighting for that spot and there were many changes; there were a couple of girls hitting the top,’ added Jankovic.

‘But in the autumn I had a great couple of tournaments - I played very well in the US Open and then won three tournaments in a row and I was able to finish the year as the number one player in the world.’

It was a satisfactory end to a year which included the runners-up spot at the US Open and semi-final places in the Australian Open and the French Open at Roland Garros, while Jankovic exited the fourth Grand Slam, Wimbledon, in the fourth round.

Having lost to eventual champion Maria Sharapova in 2008, Jankovic, who will prepare for the Australian Open with the JB Group Classic in Hong Kong, returns to Melbourne this year optimistic of ending her quest for the elusive Grand Slam title.

‘I'm working very hard and that is one of my priorities for 2009, to win a Grand Slam, to start by winning one,’ she said.

‘I believe in myself and I believe my time will come.’

Jankovic has been the subject of an all-access documentary in Serbia, while she continues studying for an economics degree at Megatrend University in Belgrade and is designing a clothing range.

She believes the off-court distractions can boost her game, which she hopes will go from strength to strength in the next 12 months.

‘Tennis is my priority but I think it's very important to get your mind off of tennis and do other things,’ she said.

‘I do all of those things with a smile on my face and I want to do it. It helps me to make my tennis game a lot better because it's not only tennis, tennis, tennis all day long.

‘I do other things that makes me more relaxed and when I go on the tennis court, more focused on the job.’