He made more than 50 appearances for Argentina in an 11-year international career, and scored one of the goals of the tournament at the 2006 World Cup, finishing off a 26-pass move in an 6-0 rout of Serbia.
Cambiasso began his playing career at Independiente, before having spells at River Plate and Real Madrid.
He could make his debut for promoted Leicester in Sunday's home game against Arsenal.
(Reporting by Toby Davis; editing by Ken Ferris)
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