The Premier League have risked further tension with Newcastle by extending their ban on related-party sponsorship deals until the middle of next month.
The moratorium on clubs signing new commercial contracts, which was introduced last month as a direct result of Newcastle's Saudi takeover, was due to end next Tuesday but will now run until December 15 at the earliest.
Newcastle voted against the sponsorship ban at the emergency meeting which led to its introduction on October 18, while Manchester City abstained on the grounds that the prohibition was anti-competitive and potentially unlawful.