Mr Balls returned the favour yesterday by criticising Mr Miliband's brother, Ed, who is the other main challenger in the race to succeed Gordon Brown. (telegraph.co.uk)
Having been Chelsea's main challengers for most of the season, just two wins in eight games in all competitions has seen them knocked out of the Champions League, and overtaken by Arsenal and Manchester United in the Premier League, whilst Liverpool's win over Newcastle has brought them right back into the equation. (caughtoffside.com)
China, in particular, clearly appears as America's main challenger economically and even geopolitically. (carnegieendowment.org)