Liverpool striker Luis Suarez has been charged with improper conduct during Monday's English Premier League defeat by Fulham, the Football Association (FA) said on Wednesday.
Uruguay forward Suarez was charged, the FA said, "in relation to an alleged gesture made towards the Fulham fans at the end of the fixture".
Suarez has until 1600GMT on Monday to respond to the charge.
Liverpool were also were hit with a separate charge of failing to ensure their players conducted themselves in an orderly fashion, following the sending off of midfielder Jay Spearing in the same match at Craven Cottage.
A Liverpool statement said: "Liverpool FC today (Wednesday) received notification from the Football Association of their decision to charge both the club and Luis Suarez following the game against Fulham.
"The club will take the appropriate time to properly review the documentation sent to us before making any further comment."
Fulham won 1-0 thanks to a late Clint Dempsey goal after Liverpool had been reduced to 10 men.
Suarez, who was charged by the FA in November with racially abusing Manchester United's Patrice Evra, had a goal disallowed and also felt he should have had a penalty.
"We'll look after Luis as best we can, and I think it's about time he got a bit of protection from some people," said Liverpool manager Kenny Dalglish, who admitted he hadn't seen the incident involving Suarez and the Fulham fans, after the match.
Suarez also had to contend with chants of "cheat" from Fulham fans convinced he wad going to ground too easily when challenged.
But Dalglish, who said the chants aimed at Suarez were "scandalous," insisted: "His integrity is impeccable. He can look in the mirror and go to bed at night and sleep soundly."
Spearing was shown a straight red card by referee Kevin Friend for a tackle on Mousa Dembele where he won the ball but caught his opponent in the follow through.
Liverpool's players reacted angrily to the decision
"Jay will be upset, obviously. But we will look at it and see if it's worth while appealing," Dalglish said.
"You need to ask the referee what his interpretation is. What the level of acceptance is. Jay never had another thought in his mind but to win the ball, and he did win it."