Litigation heavyweights Carter Ruck and Herbert Smith are crossing swords this week as one of the most high-profile libel cases to reach the High Court for years gets underway.

The case sees Carter Ruck represent the founder of advertising and marketing giant WPP, Sir Martin Sorrell, in his libel claim against Italian businessmen Marco Benatti and Marco Tinelli. The pair are senior executives with Italian media company FullSix, which WPP owns a stake in. Benatti was a senior consultant to WPP until an acrimonious split in 2006.