Middlesbrough sign Dutch midfielder Marten De Roon from Atalanta

Middlesbrough, who won promotion from the Championship last season, did not disclose financial details of the deal but media reports said that the Riverside club had paid around £12 million for his signature.

The 25-year-old scored one goal in 36 appearances for Atalanta last season and is Boro's third signing of the close season, following the arrivals of winger Viktor Fischer and defender Bernardo Espinosa.

"Really happy with my transfer to Middlesbrough! Let's make a good season in the Premier League. Come on The Boro," De Roon said on Twitter.