The Nigeria international will be expected to miss Napoli's next two Serie A matches against Genoa and Juventus, on August 29 and September 11
Napoli manager Luciano Spalletti has warned striker Victor Osimhen to watch his reactions in future assignments after getting sent off in the 2-0 win over Venexia on Sunday.
In the Serie A match played at Diego Armando Maradona Stadium, the Nigeria international was punished for violent conduct on Daan Heymans during a corner-kick situation in the 23rd minute.
Despite the numerical disadvantage, Spalletti's men held their nerve and prevented their opponents from scoring before half-time, when they made some tactical changes.