Both Abraham (Nigeria) and Tomori (Nigeria/Canada) are eligible to play senior international football, an option that will be nullified should they appear in a competitive fixture for the Three Lions. Abraham, 22, and Tomori, 21, have both played for England at the youth level.
Abraham, who had earned caps for England in friendlies versus Brazil and Germany in 2017, had considered switching his international allegiance to Nigeria.
The Three Lions look to extend a perfect start to qualifiers when they travel to Prague to face the Czechs on Oct. 11 before visiting Sofia for a match against Bulgaria on Oct. 14.
Here's the full squad:
Goalkeepers: Tom Heaton (Aston Villa), Nick Pope (Burnley), Jordan Pickford (Everton)
Defenders: Danny Rose (Tottenham), Tyrone Mings (Aston Villa), Harry Maguire (Manchester United) Joe Gomez (Liverpool), Kieran Trippier (Atletico Madrid), Michael Keane (Everton), Fiyako Tomori (Chelsea), Ben Chilwell (Leicester City), Trent Alexander-Arnold (Liverpool)
Midfielders: James Maddison (Leicester City), Jordan Henderson (Liverpool), Declan Rice (West Ham), Mason Mount (Chelsea), Fabian Delph (Everton), Harry Winks (Tottenham), Ross Barkley (Chelsea)
Forwards: Tammy Abraham (Chelsea), Callum Wilson (Bournemouth), Harry Kane (Tottenham), Marcus Rashford (Manchester United), Jadon Sancho (Borussia Dortmund), Raheem Sterling (Manchester City)