England head coach Roy Hodgson anticipates the shrinking pool of talent he can pick from will continue to get smaller - and expects no sympathy from club managers in terms of their selection policy.
Only 32% of the players who turned out in the nine Barclays Premier League fixtures immediately prior to the current international break were English qualified.
The problem was highlighted ahead of Tuesday night's World Cup qualifier with Ukraine at Wembley after Hodgson was forced to call in reinforcements after players withdrew through illness or injury.
Hodgson drafted in Tottenham midfielder Jake Livermore - who made his England debut against Italy last month - and uncapped duo Adam Lallana (Southampton) and Raheem Sterling (Liverpool).
The England boss is aware the percentage of players available for him is unlikely to improve.
He said: "We can't deny that. Would I prefer to have a reverse of that statistic, with 68% of players being English? Of course I would.