Bilic is already under intense pressure from the boardroom after three straight defeats left the Hammers rock-bottom of the Premier League.

Sullivan is heading out of the country for a working break but will talk with his manager on the phone to get answers for Saturday’s 3-0 horror defeat at Newcastle.

They will also try to thrash out a plan to help turn things around when the team returns after the international break.

Croat Bilic is in the last year of a three-season contract and retains the overwhelming support of the Hammers fans.

And club insiders believe the manager has been seriously let down by senior players who are making mistakes and failing to concentrate fully during games.