Avram Grant suggests his relationship with the West Ham board is strained following the collapse of Steve Sidwell's transfer.
The former Aston Villa midfielder was due to sign for the Hammers having agreed terms and passed a medical, only for the board to pull the plug on the deal.
It is thought they felt the transfer was unnecessary upon the return to fitness of Mark Noble, with vice-chairman Karren Brady informing Grant of the intervention.
Sidwell subsequently joined relegation rivals Fulham, much to the frustration of Grant, who claims he will vent his feelings on the matter later this week.
"I can say one thing - it is the last time I will ever speak about a player signing for us before he has officially signed," Grant told The News of the World.
"Karren has told me the reasons why the deal has not happened but I will have my say this week."
The Israeli saw his side defeat Barnsley 2-0 in the FA Cup on Saturday, taking their good run to three wins and two draws two in their last six outings.
However, they remain bottom of the Premier League and, with Birmingham visiting Upton Park on Tuesday, Grant concedes the club are still in a lot of trouble.
"We have problems on and off the field," he admitted. "We knew it would be a difficult season.
"We had a difficult season but are two points from 14th in the Premier League. We have only had two or three games where we have not played well."