Coates was on loan at the Stadium of Light from Liverpool last season.
The Uruguayan completed his move to Sunderland yesterday in a deal reported by the Guardian to be worth £2 million. Towards the end of last season he was getting a lot more regular game time, and was putting in good, consistent performances and showing signs of delivering on his promise.
He's quoted by the Sunderland Echo, saying: “The manager gave me confidence last year when he came in (to the club). For me, it was very important to play and be involved in the team.
“The confidence he gives to the players and the team and the supporters is very important.”
It seems to be a good move for Coates, whose chances would have been limited had he stayed at Liverpool given the amount of defenders they have at their disposal.
A permanent move to the Stadium of Light will at least allow him to get games on a more regular basis and aid his development - as well as his international chances.
He added: "For me, I played really well at the end of last season and the team did as well so I hope we can be good this year.”
If both the player and the team can start the next season in the same way they finished the last, then maybe their relegation fears will be eased well before the business end of the campaign.