Pictures on social media showed the three Spurs players together at a party along with West Ham United midfielder Manuel Lanzini.
Under the British government guidelines set on Dec. 19, those living in Tier 4 regions such as London, where the two clubs are based, were not allowed to mix with others outside their own household over Christmas.
“We are extremely disappointed and strongly condemn this image showing some of our players with family and friends together at Christmas... ” a Spurs spokesperson said in a statement released to British media.
“The rules are clear, there are no exceptions, and we regularly remind all our players and staff about the latest protocols and their responsibilities to adhere and set an example. The matter will be dealt with internally.”