The Irishman was a target for Carvalhal when he was at Celtic.
Sunderland completed a move for Lamine Kone last week.
Crystal Palace will face Tottenham Hotspur in the fifth round of the FA Cup this season.
Patrick Roberts has joined Celtic on an 18-month loan from Manchester City.
Here is how we predict Norwich City and Tottenham Hotspur will line up this week:
Newcastle United are to revisit signing Saido Berahino in the summer instead.
Winger Mekhi Leacock-McLeod has revealed that he has signed for Rangers from Wolverhampton Wanderers.
Joey Barton suggests that Manchester City are as big a club as Leeds United and Sheffield Wednesday.
Gabriel Paulista and Nacer Chadli have both expressed their happiness at being Arsenal and Tottenham players.
Alan Judge is staying at Brentford - though Sunderland were allegedly interest in his signature.
Could Tottenham Hotspur have a highly-effective new right-sided combination on their hands?
Tottenham Hotspur's new signing is a versatile player, and could be tasked with helping out in a problem position if the club look to persevere with their other central defenders.
An updated Northumberland Development project meant there was plenty of good news for Spurs fans on Wednesday.