To top it all, Chelsea lost against the London neighbor 2-1 and is only tenth in the table.
Felix, who arrived on loan from Atletico Madrid, tried to reach the ball and slid forward with an outstretched leg towards Kenny Tete and tried to pull his foot back but failed and hit the shin with hard force.
The Fulham players surrounded the referee who then got the Chelsea players around him.
From a distance, the referee held out the red card against the Portuguese World Cup player who was hoping for the best.
Could be three game suspension
Until the expulsion, Felix was Chelsea's best player.
Now there is talk of a three game suspension.
On the bench, Chelsea coach Graham Potter spoke to the fourth official.
Despite the loss, Potter took time afterward to thank the fans and walk around the field.
When the incident occurred it was 1-1.
With 20 minutes remaining, Carlos Vinicius headed in 2-1 for Fulham and the chants of the fans at Craven Cottage took off again.
Chelsea goalkeeper Kepa Arrizabalaga got the cross completely wrong and facilitated Vinicius' goal.
Fulham took their fourth consecutive win in the top league, which is the first time the club has done it since 1966. They are now in touch with the European places as sixth in the table after passing Liverpool.
It was Fulham's first win against Chelsea in almost 17 years.