Former Dutch defender Ramon Zomer is full of praise for new Chelsea signing Hakim Ziyech.

Ajax and Chelsea have confirmed Ziyech will move to London in the summer for €44m.

Zomer, who played alongside Ziyech for SC Heerenveen, said his vision set him apart from both team-mates and opponents from an early age.

"I was sat on the bench and tried to keep track of how often he saw openings that we didn't see," centre-back Zomer said of Ziyech, who came through the academy at Heerenveen and signed his first professional deal aged 19.

"There were a lot of them.

"It was not nice to be a substitute, but with Hakim on the field we at least had something to enjoy."