Walter Samuel has “a serious rupture of the anterior cruciate ligament and collateral ligament,” while Douglas Maicon has a thigh strain.
The two Inter players were forced off during last night's 1-1 draw against Brescia.
It was immediately clear that 32-year-old Samuel had a very serious injury, as he knocked knees with Andrea Caracciolo to push his leg backwards.
“The tests have found a serious rupture of the anterior cruciate ligament and collateral ligament in the right knee,” read a statement on the official club website.
“Over the next few days we will plan the reconstructive surgery.”
Samuel's season is effectively over, as he suffered a similar setback in 2007 that kept him out for nine months, but that was in his left knee.
Meanwhile, Maicon has been diagnosed with “a thigh strain at the back of his left leg.”
That is not too serious, but could keep the Brazilian out of action for a couple of weeks, if not a month.
“Walter has already proved he knows how to come back stronger than ever. We are all with him,” wrote captain Javier Zanetti.
“He is someone who never gives in.”