United have lost 12 League games this season and their certain 7th place finish in the Premier League has seen United's players under pressure.
Hodgson said Manchester United players do not have a ‘God-given right’ to a place in his England squad.
According to the Mail, Hodgson has warned the likes of Michael Carrick, Danny Welbeck, Phil Jones, Chris Smalling, Ashley Young and Tom Cleverley that poor club form will affect their national-team prospects.
In the case of Welbeck and Carrick – both regulars during World Cup qualifying - their chances of starting in Brazil appear slim following disappointing seasons with United.
And Hodgson was clear when he insisted his thinking would be swayed by performances at club level, referencing the players at Old Trafford in particular.
‘Manchester United are one of the few teams that have had a lot of English players,’ he told The Independent. ‘But football players have to accept unfortunately their England careers are tied up with their club careers.
‘If it’s not going well in their clubs, and it’s not going well for them in their clubs, and other players are doing extremely well in their clubs, it does put your position as a national team player under some sort of threat.
‘I’m pretty certain that the Manchester United players will understand that – that there’s no God-given right that, because they’ve played in a few games up to now, they’ll play all the games in the future.
‘It’s up to me to pick who the best players for the job are at any given moment.’
Wayne Rooney – fitness pending - is almost certainly the one United player who will start the opening match against Italy on June 14.
Carrick, Welbeck, Jones and Smalling will all be vying for a place in the squad, but Cleverley and Young are in danger of missing out completely.
Hodgson names his squad on May 12, the day after the final round of Premier League matches and the clubs that might benefit are the likes of Southampton and Liverpool who in contrast have had superb seasons.