Emmanuel Eboue has been banned for three games after being found guilty of violent conduct by the Football Association.
The Arsenal right-back was charged by the governing body for striking Chelsea's Wayne Bridge during the Carling Cup final.
The charge stemmed from the fracas in the final minutes of Chelsea's 2-1 win at The Millennium Stadium.
Eboue contested his charge and The FA's disciplinary took a closer inspection of the incident on Thursday.
However, after looking at documents and video evidence, Eboue's charge stands and the 23-year-old will serve a three-match suspension.
Eboue will sit out Arsenal's upcoming Premiership fixtures against Reading, Aston Villa and Everton.
Kolo Toure was also banned for his part in the melee, while Emmanuel Adebayor will learn on Tuesday if he has been successful in his latest appeal.
The Gunners striker has denied a charge of reacting aggressively and failing to leave the field of play immediately after being sent off.
Toure, Eboue and Adebayor are all out of Arsenal's home game against The Royals this weekend through suspension.