After the German was the victim of alleged racist abuse during Sunday match, the home side has pledged to take action
Tottenham intend to take strong action and will impose stadium bans against any supporters found guilty of racist behaviour during Sunday's 2-0 defeat to Chelsea.
A first-half brace from Willian gave Frank Lampard's visitors a deserved victory in north London but an incident after the hour marred the contest.
After objects were thrown at Chelsea players, Blues defender Antonio Rudiger told the match officials he had been subjected to racist chanting.