Fulham say they will crack down on abuse handed to Aboubakar Kamara on social media following his penult miss against Huddersfield.
The Frenchman took the penalty off usual taker Aleksandr Mitrovic.
A Fulham spokesperson said: "We are aware that numerous hurtful comments have been posted on Aboubakar Kamara's social media account.
"As a club that prides itself on our respect and civility, we condemn anyone associated with this repulsive activity.
"The club will provide all necessary support to Aboubakar and take the strongest possible action against those responsible."