Donny van de Beek says he is "confident" that Ajax team-mate Hakim Ziyech "will do well" at Chelsea if his proposed move to Stamford Bridge goes through as expected.
Goal has reported that the Blues are close to agreeing a €45 million (£38m/$49m) deal to sign Ziyech, who is likely to become Frank Lampard's first major signing at the club.
The Chelsea boss tried to bring in the 26-year-old in January but Ajax made it clear that they were not prepared to sanction his departure until the end of the season.