Everton say they are "appalled" by the behaviour of Moise Kean after he reportedly breached the UK government's Covid-19 guidelines.
The country remains in lockdown due to the pandemic but social media posts appeared to show the 20-year-old Italian partying with guests at his home.
Everton says it’s "strongly expressed its disappointment to the player".
In a statement, the club added: "Everton has regularly stressed the importance of following all the government guidelines - including rules and advice for inside and outside of the home - through a series of official communications to all staff members, including players.
"The amazing people in the NHS deserve the utmost respect for their hard work and sacrifice. The best way to show them respect is by doing everything we can to protect them."