The BBC is reporting lock Joe Launchbury and centre Jonathan Joseph are both in danger of being shock exclusions from Warren Gatland's squad.
While England's New Zealand born captain Dylan Hartley's chances are rated as 50-50.
About 14 Englishmen are expected to be included.
Rookie prop Kyle Sinckler and centre Ben Te'o look likely to make the cut.
Gatland is set to name his squad of 37-39 players tomrrow night.
Gatland and his coaches will meet for a final selection meeting on Tuesday, with Lions sources insisting nothing is yet set in stone.