Swansea director John van Zweden has stuck the boot into Louis van Gaal following Manchester United's 2-1 loss to the Welsh club at the Liberty Stadium.
The United manager had recently boasted that his side were the most consistent in the Premier League, losing only one of their 19 games and that criticism of his side's performance in the wake of a few insipid showings was unwarranted.
In reply, Zweden, who is a major critic of his compatriot, stated according to the Mirror, "Yes, and I find him an arrogant b******."
The feud was far from resolved after the game, following Swansea's historic 2-1 win against their more decorated rivals. The victory completed Swansea's league double over United, having already beaten them at Old Trafford in the reverse fixture on the opening day of the season.
Zweden tweeted after the game, "Dear Louis. Sleep well mate 6 points and The double. @SwansOfficial @ManUtd 2-1 again!!! #easy."
The exchange of pleasantries had reportedly started well before the game, when Zweden remarked over lunch after the United manager had ostensibly ignored the Swansea delegation, "Hey, Louis, I'm going to take three points back to the Hague, you silly s**.
The director added that Van Gaal was not too pleased by the retort and was willing to confront him after the game to see if his confidence held any ground once the Red Devils had done with them.
"'I'll see you after the match and we'll see if you still have the gift of the gab then.' I didn't see him after the game," Zweden said, in response to Van Gaal's reported reply.
It has been a difficult week for Van Gaal, who has seen Arsenal leapfrog them into fourth spot, while arch rivals Liverpool have closed the gap on them to only a couple of points.
Any further mishap in the next few days will all but end their hopes of securing a top four spot and put Van Gaal's position at the helm in serious doubt.