The incident occurred during a 1-1 draw with Heerenveen last month, wth Denzel Dumfries the unlucky opponent.
Dumfries took a beating that day, also being on the receiving end of an elbow from Tim Matavz which led to the striker being slapped with a four-match ban.
An official statement released by Vitesse read: "We have fined both because it doesn't fit with the concept of fair play at the club."
Miazga joined Chelsea in January of 2016 from MLS side New York Red Bulls, but was loaned to Vitesse the following Summer.
21 January 2018