Mark Noble was pictured sweeping West Ham's dressing room clean after their win at Lyon on Thursday.
The London side booked a place in the Europa League semi-finals as they beat the Ligue 1 side 3-0 in France, with goals from Craig Dawson, Declan Rice and Jarrod Bowen securing the win.
After the team had finished celebrating their 4-1 aggregate victory, captain Noble took to cleaning duty.
What has happened?
West Ham posted an image of the midfielder on social media showing him in a towel sweeping the dressing room.
"Says it all about this man," they posted. "Our captain."
What next for West Ham?
West Ham turn to Premier League action this weekend with a home game against Burnley, followed by a clash with Chelsea.
David Moyes' team will then resume their Europa League campaign with a home match against Eintracht Frankfurt in the first-leg of the semi-final.