Another solid signing
Denayer has become David Moyes' fifth defensive signing of the summer transfer window, following on from Papy Djilobodji, Donald Love, Paddy McNair and Javier Manquillo.
The young Belgian has Champions League experience with both Celtic and Galatasaray, winning PFA Young Player of the year along with a league and cup double in Scotland, and the Turkish Cup last season.
The 21-year-old has eight senior caps for the Belgium national side, having played at both U19 and U21 level, and featured in their Euro 2016 quarter-final journey this summer.
Busy last few hours
It certainly has been a busy day on Wearside, as Moyes looked to make some last-ditch attempts to strengthen his squad in the final few hours of the window.
The Black Cats certainly put their money where their mouth is, smashing their club transfer record for young midfielder Didier Ndong from French side Lorient.
He has been signed for fee of 16 million Euros, having only joined in January 2015, and he shared his delight at signing for the Black Cats.
“I am very proud and happy to sign for Sunderland. This is a new adventure for me and to play in the Premier League is a dream come true." He exclusively told safc.com.
The 22-year-old concluded: “Maybe the Sunderland fans don’t know me yet, but I promise that they will quickly discover that I will give everything for them and the club," and he admitted that "It will be an honour to wear the Sunderland shirt and I will wear it with a true understanding of what it means."
Sunderland AFC will take on Everton at the Stadium of Light on Monday, September 12 with kick-off at 8pm BST.