Xavi was furious at Nacho's reduction in punishment, believing it was to benefit Real Madrid in El Clasico
Real Madrid's appeal was successful, and Nacho's suspension was changed from 3 matches to 2. Barca coach Xavi is reportedly angry about this.
Nacho was originally banned for 3 games for his previous tackle, but Real Madrid eventually appealed and succeeded in reducing the ban to 2, allowing Nacho to participate in El Clasico against Barcelona at the end of the month.
Nacho's reduced suspension has angered Xavi, and his coach team believe RFEF did so to benefit Real Madrid in El Clasico.