Mayweather is now unbeaten in 38 professional encounters, while De la Hoya, a six-weight world champion, fell to 38 wins and five losses.

BBC: Mayweather overcomes De la Hoya

Khan also believes working alongside four-weight world champion Pacquiao, who is currently preparing to face De la Hoya, will help his development.

BBC: Khan seeks redemption with Roach

Or perhaps the weight of the evidence was just plain negative enough to encourage some de-risking of portfolios.

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Bristol-Myers Squibb, meanwhile, is putting media weight behind its commercials with Lance Armstrong, a six-time Tour de France winner and a cancer survivor.

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