Manchester City have signed Mateo Kovacic from Chelsea for an initial £25m fee plus £5m add-ons.
The 29-year-old Croatia midfielder has signed a four-year contract with the treble-winners.
“This is a brilliant move for me, and I cannot wait to get started with City,” he said.
“Anyone who has watched this team under Pep knows how good they are. For me, they are the best in the world. The trophies they have won are clear for all to see, but they are also the best footballing side out there.
“To be joining this squad really is a dream for any footballer. I still have plenty of learning and developing to do, and I know under Pep’s management I can become a better player, which is really exciting for me.
“My plan now is to rest for a few weeks before coming back to Manchester to prepare for the new season. I want to help this club stay at the top and win more trophies.”