Craig Gordon is looking forward to playing in the Premier League after completing a move to Sunderland that may be worth up to £9m.
His transfer from Hearts could eventually be a British record deal for a goalkeeper.
“It has been quite difficult. I’ve known about the speculation for the last five or six weeks,” he said.
Gordon admitted it was a “wrench” to leave Hearts but said it was time to test himself at a higher level.
“To leave Hearts behind – the club I supported as a boy – is hard but you come down here and see the difference between the SPL and the Premiership and it is something you have to go and experience,” he added.
Quizzed about his fee being a record transfer fee for a goalkeeper in Britain, he said: “Prices are going up all over the place and it’s a big story because it’s a goalkeeper but I expect the prices to keep rising.
“I don’t think I’ll be the most expensive for very long.”