Chelsea manager Frank Lampard has been warned that £33.3m new boy Hakim Ziyech can be a "trainer's nightmare" by Ajax boss Erik ten Hag.
Ziyech is set to join up with the Blues next season as part of a bumper spending spree which will see Timo Werner also make the move to Stamford Bridge.
The 27-year-old played his last game for Ajax back in March, with the Eredevisie season officially curtailed due to the effects of the ongoing coronavirus pandemic in April.
Now, with Ziyech waiting to join up with his new Chelsea team-mates, his former boss Ten Hag has advised the Blues on how to get the best out of the attacker.
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