Marten de Roon: Middlesbrough sign Atalanta midfielder for undisclosed fee
Middlesbrough have signed Atalanta midfielder Marten de Roon for an undisclosed fee, widely reported to be around £12m.
The 25-year-old Dutchman scored once in 36 Serie A appearances last season.
The defensive midfielder is Boro's third summer signing as they prepare for their first season back in the Premier League after promotion in May.
"Really happy with my transfer!" he tweeted. "Let's make a good season in the Premier League. Come on The Boro!"
The Riverside team had already signed defender Bernardo Espinosa from Sporting and winger Viktor Fischer from Ajax in this transfer window.
Find all the latest football transfers on our dedicated page.