Esteban Cambiasso was diagnosed with a thigh strain on Friday to add to Inter Milan's already growing injury worries.The Argentina midfielder picked up the problem in Wednesday's 1-0 defeat at home to Bayern Munich in the Champions League. Inter also lost centre-back Andrea Ranocchia for two to three weeks in that game, leaving them with a defensive problem ahead of the visit of Sampdoria on Sunday. With Walter Samuel out for the rest of the season and right-back Maicon suspended, the loss of Ranocchia, with Ivan Cordoba also struggling to be fit, leaves Inter threadbare at the back.