Leeds United owner Andrea Radrizzani has told fans on social media the club has "been screwed up" following the collapse of a proposed transfer.
The Premier League side were negotiating to bring Bamba Dieng in from Marseille, with Radrizzani having earlier taken to Twitter to confirm a move was set to go ahead.
Replying to a fan, Radrizzani also acknowledged the intention to sign Cody Gakpo from PSV as Leeds pushed to bolster their attacking ranks before the transfer window shut on Thursday evening.
"Let's welcome Bamba Diang and we will continue to work on Gakpo. Now it's time to focus on the pitch and support our new project and the great job Jesse [Marsch] and the staff are doing," he posted.
However, Leeds' desire to land Diang from the Ligue 1 side fell flat following the emergence of Nice as rivals for the player's signature, leaving the deal at a crossroads.
Diang was reported to have been waiting at an airport while he decided whether he wanted to move to Elland Road or the French Riviera, then apparently electing for the latter option.
Radrizzani then returned to social media to address the situation and claimed they had been "screwed up".
"Part of the madness of deadline day. We have been screwed up, it happens even to the best ones," he said.
"We have done a great market, planned and executed our targets at a very early stage. Keep going."
Leeds have lost just one of their opening five Premier League matches this season and face Brentford on Saturday.