The defender is now on-loan with Roma.
“Not really," he told the Telegraph when asked if Maguire had effected his future.
“I had spoken to the manager before Harry came and I knew I was behind him and Vic [Lindelof] but in previous seasons I had started behind [two first-choice centre-backs] and after four or five games I had worked myself into the team.
“I love a challenge and when a new centre-back comes in it makes you raise your game.
“You have to show more, you have to be more consistent."
He added: “If I had stayed I would have taken on that challenge and I would have been very confident that I would have played the number of games that I was worthy of.
“Equally I have a challenge here at Roma.
“Going back I will have an added element that some of the centre-backs won't have.
“The easy decision was to stay."