Over a long period of time, the jordan heels  could become totally flat, which causes problems when you want to wear flat shoes. Sporting Index’s tennis traders are of course fully aware that the elite normally prevail in SW19 – only one wildcard has ever won the men’s championship, famously Goran Ivaniševi in 2001. But tennis spread bettors looking to sell any of the top four in favour of perhaps Argentine Juan-Martin Del Potro or American Andy Roddick, ranked 5th and 6th respectively, may be disheartened to learn that no man from outside Europe has won since the Australian Hewitt in 2002.

Buyers of Murray’s outright spread may also look to Nadal’s dodgy knees as a hint to the Scot’s chances of being the first British winner since Fred Perry in 1936. However, sellers of either Murray or Nadal’s spreads might be cautious of Roger Federer’s return to form and his recent maiden French Open victory. So, the many spread buyers of Andy Murray’s outright index will hope he can emulate the achievements of current world number one Nadal, who won his first-ever grass court title at the Wimbledon warm-up last year before crossing London to win lawn tennis’ jordan heels.