in october 2000, he signed a four–year contract with internazionale for a fee of €4.857 million (exactly 9.5 million deutsche mark), which media reported a difference figure from 9 billion lire (€4.65 million) to 14 billion lire (€7.23 million) greško was the first slovak who ever played for inter. he made his league debut on 1 november 2000 in a 2–0 victory against roma. on 5 may 2002, during the last week of the 2001–02 season, greško headed the ball to karel poborský, allowing him to score in a 2–4 defeat against lazio. after the match, he was heavily criticised for the error, which led to inter losing the scudetto. his performance at inter milan was "firm" and "erratic". he spent only eighteen months between november 2000 and june 2002, making a total of 41 league appearances.