Manchester City boss Pep Guardiola has admitted he has failed to get the best out of Kalvin Phillips since signing him from Leeds United.
Phillips joined City from the Elland Road outfit in the summer of 2022.
Despite his £45m fee, the 27-year-old will start for only the fifth time for City when they take on Newcastle in the EFL Cup at St James' Park on Wednesday.
"Marcelo [Bielsa] gave Kalvin the best of Kalvin in his career," said Guardiola.
A hero at his hometown club, Phillips became an England international under Bielsa's stewardship when Leeds were still in the Championship.