Manuel Lanzini has apologised for making a "bad mistake" after breaking strict Covid rules over the Christmas period.
Lanzini was pictured alongside Tottenham stars Giovani Lo Celso, Erik Lamela and Sergio Reguilon with their families on Christmas Day.
The photo was posted to Instagram and was taken in what is believed to be Lo Celso's house.
A total of 11 other adults, two children, and a baby were also pictured, despite Tier 4 guidelines prohibiting different households from meeting indoors.
Lanzini said on Twitter: "I want to apologise for a bad mistake I made over Christmas and I take full responsibility for my actions. I know people have made difficult sacrifices to stay safe and I should be setting a better example."
Spurs said in a statement: "We are extremely disappointed and strongly condemn this image showing some of our players with family and friends together at Christmas.
"Particularly as we know the sacrifices everybody around the country made to stay safe over the festive period.
"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."
A West Ham statement added: "The Club has set the highest possible standards with its protocols and measures relating to Covid-19 so we are disappointed to learn of Manuel Lanzini's actions.
"The matter has been dealt with internally and Manuel has been strongly reminded of his responsibilities."
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