The Football Association is hoping to find out whether Dele Alli will be hit by a FIFA ban for his middle-finger gesture before Gareth Southgate names his England squad on Thursday.
The Three Lions welcome Slovenia to Wembley next week, before heading to the Baltics as their World Cup qualification campaign comes to an end at Lithuania.
A five-point cushion at the top of Group F leaves England on the brink of sealing their place in Russia, but Southgate may have to deal without Alli for some, if not all, of the upcoming international break.
FIFA confirmed to Press Association Sport that its disciplinary committee will decide on Wednesday or Thursday what, if any, punishment the Tottenham midfielder faces for raising his middle finger during the qualifier against Slovakia.
Alli could be hit with a ban and/or a fine for September's incident, with a lengthy suspension meaning the 21-year-old could potentially even miss the start of next summer's World Cup.
The Tottenham midfielder has stressed it was aimed at team-mate Kyle Walker rather than the officials or any Slovakia player, with the FA submitting video evidence and written statements to FIFA in a bid to back up their case.
English football's governing body is hoping to find out the decision before Southgate announces his squad on Thursday, but a FIFA spokesperson told Press Association Sport that "disciplinary decisions are usually notified and communicated a few days after the hearing".
Alli's future is an unwanted complication ahead of Thursday's squad announcement at St George's Park, where the England boss will be unable to call upon Nathaniel Chalobah again.
The highly-rated Watford midfielder was in line for his England debut having been involved in the squad for the first time last month - but the 22-year-old has had to undergo surgery on a knee injury sustained in training.