|Marten de Roon signed for Atalanta Bergamo in July 2015, leaving sc Heerenveen. Atalanta Bergamo, finishing at 17th position in the Serie A in the season 2014-15, had send multiple scouts to games of sc Heerenveen since at least 4 or 5 of them had seen De Roon at least in 10 matches.
De Roon played a great season at Atalanta Bergamo. Middlesbrough, just promoted to the Premier League, bought De Roon for a transfer fee of 14ME. The midfielder signed a 4-year contract at the club from North England.