Everton boss Ronald Koeman is convinced the best is yet to come from defender Michael Keane after splashing a fee which could rise to £30million to secure his services.

The 24-year-old England international finally completed his move to Goodison Park from Burnley on Monday when he signed a five-year deal as the Toffees summer spending spree continued apace.

Koeman was delighted to have got his man. “We knew there would be competition from other clubs, but Michael believes in the ambition of Everton and what we want to do and this is the perfect moment for him to come,” he said.

“I believe there is much more to come from Michael and that’s what makes his signing really exciting for me – we will see his development as a player along with the progression overall within the club.

“It’s another really positive sign of the direction the club is moving in. He’s 24 years old, his best years are to come, and I couldn’t be more pleased that he’s now a Blue.”

Former Manchester United trainee Keane revealed he had spoken to Everton’s director of football Steve Walsh, with whom he had worked during a loan spell at Leicester, before committing himself to life on the blue half of Merseyside.

Keane said: “First and foremost, the manager was a big factor in me coming to the club. He played in my position when he was a world-class player for a great Barcelona side and a great Dutch side and the style of football he likes to play will suit me, I believe.

“I watched a lot of Everton last season and I believe I really suit how the team likes to play. This is a great place to come and continue my development as a player.

“He’s convinced me that he can still improve me in certain areas of my game.”