Feyenoord coach Ronald Koeman feels Chelsea are not only helping Vitesse Arnhem on the field, but also off it.

Vitesse started the Eredivisie with six players on-loan from Chelsea and are now challenging for the title.

Koeman isn't only unhappy with the number of Blues players Vitesse boast, but also the fact their wages are, in part, being picked up by their parent club.

"Vitesse only exists because of the Chelsea players they have and because part of the salary is paid by a particular system," rapped Koeman.