Smith is fighting for his maiden professional title in only his eleventh fight in professional ranks, while reigning champion Simpson has mixed in championship class for six years and previously held the British featherweight title.
Gavin is Britain's first ever amateur world champion and he fancies his chances of emulating Khan's success of holding a professional world title.
The number of members of LinkedIn, a professional network, with the title vice-president grew 426% faster than the membership of the site as a whole in 2005-09.
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The former cruiserweight king, who has lost only once in 25 professional bouts, then defended his title by stopping American John Ruiz at the MEN Arena in April.
Months later, he made his professional debut, and in 2010, in only his seventh professional contest, he won a world title.
The teenager then claimed six amateur titles including the Irish Amateur Open Stroke Play title in 2002 before turning professional at 19 in the same year.
"When I turned professional I said I would win a world title and provided I do that then I will be happy with my career, " Harrison told BBC Sport.
The Bolton fighter probably knew that he had done little to silence the doubters who question his boxing maturity, after 18 professional fights, to challenge for a world title.
Giggs has just enjoyed one of his best seasons with Manchester United, winning his ninth Premier League title and being shortlisted for the Professional Footballers' Association Player of the Year award.
Mean Girls at Work: How to Stay Professional When Things Get Personal is the latest title from Katherine Crowley and Kathi Elster, the authors of Working With You Is Killing Me, and the authors say they were just as conflicted as I was to take on the issue of backstabbing, bullying and plain old bitchiness at work.
Dagenham fighter Cook, who has won all 27 of his professional bouts, faces American Luevano for the vacant title in Greenwich.
Draper, who won the Australian Open mixed doubles title last weekend in between making his professional golf debut at the Victorian Open, could only manage a level-par 72 in qualifying.
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Gavin, 23, knocked out Graham Fern in his third professional bout on the undercard of Khan's WBA title fight with Andreas Kotelnik on Saturday.
Winstone turned professional in 1960 and two years later claimed the British featherweight title from the highly rated Terry Spinks.
He stopped Vincenzo Cantatore in Italy in 2002 to claim the WBC title, holding it until he suffered his first professional defeat to Jean-Marc Mormeck two years later.
In terms of professional gaming, its viewership now outpaces that of legendary strategy title Starcraft, unseating the decade-old powerhouse in just a few years as the most watch pro-played game.
Professional Starcraft is a huge part of the continued success of that title for Blizzard.
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The Belfastman, now ranked eighth by the WBA, has claimed 21 straight wins in his professional career including six successful defences of the lightly-regarded IBO title.
Froch, who is unbeaten in 26 professional encounters, will be making the third defence of his world title against Kessler, who was outpointed by Wales' former world champion Joe Calzaghe in 2007.
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Hunter turned professional at the age of 16 in 1995 and won his first major title, the 1998 Welsh Open, at the age of 19.
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LinkedIn is the professional graph, organized around you, your job, your industry, your title and your function.
The Croatian did not play in a major final until his remarkable run to the Wimbledon title as a wildcard in 2001 -- 13 years after turning professional.
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Warren has decided DeGale can wait no longer to fight again following his title success over Paul Smith in December, in only his ninth professional bout, and he will take on an unnamed opponent at Braehead Arena.
While gamers in South Korea are lining up to get copies of the new title, StarCraft II could be a game changer in the country's professional circuit, Fields said.
Williams, who lost a world title challenge against Vitali Klitschko the same year, handed prospect Airich, 29, his first professional defeat.
It was Rees's first defeat in 28 professional bouts and compounded a bad month for trainer Enzo Calzaghe, whose WBO cruiserweight champion Enzo Maccarinelli lost his title to David Haye a fortnight ago.
Taylor, ranked number one in the Professional Darts Corporation, won his 21st tournament of 2009 and will now turn his attentions to claiming a 15th world title at the Alexandra Palace in December.
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