Commodity currencies including the Russian rouble are responsive to expectations of a rise in commodity prices fuelled by Fed easing, while investors view the Mexican peso, along with the Canadian dollar, as a play on any economic recovery in the US because of their strong trade links.

CNN: QE3 triggers fear of new currency wars

Not only has Sharapova failed to play in front of her Russian fans in recent years, she has also declined to play for her country in the Fed Cup, the women's version of the Davis Cup.

BBC: SPORT | Tennis | From Russia - no love

Ten years ago this month, the New York Fed orchestrated the orderly unwinding of hedge fund Long-Term Capital Management, which foundered on exposures to Russian government bonds.

FORBES: Reported Merrill deal talks--just the latest surprise.