He is absent in the match against Zob Ahan in the second leg of the AFC Champions League Round of 16, scheduled for Tuesday.
Ebrahimi injured in the first leg in Isfahan’s Fooladshahr Stadium on Tuesday, where the Blues suffered a 1-0 defeat against Zob Ahan.
The midfielder has suffered a hairline fracture in his right foot.
“I will definitely be fit for the World Cup,” Ebrahimi insisted.
“Despite the speculation, I will be ready for the World Cup,” he added.
Esteghlal midfielder Dariush Shojaeian has already missed the 2018 World Cup after suffering a torn ACL in Isfahan last week.
Ebrahimi has been invited to 35-man provisional Iran squad.