"People say he's a wheeler-dealer and it's so disrespectful", Merson says in an episode of Sky One's panel show A League Of Their Own.
His comments come after Merson took aim at the Frenchman by claiming the Gunners could win the Premier League if he was a bit more like Harry Redknapp.
Merson has agreed to play for Caerau at the age of 49 after becoming mates with the club's secretary.
'Tactically, he's one of the best I've worked with. I thought 'what have I done coming here - this is going to be embarrassing'.
Redknapp is now unemployed after a disastrous start to the season with Birmingham saw him leave the Championship club following six straight defeats.
Juan Martin del Potro battles past Alexander Zverev at Shanghai Masters
Zverev has already joined Federer and Shanghai top seed Rafael Nadal in the field for next month's ATP Finals in London. And then came the turning point as he yielded the crucial service break to go 3-2 down in the third set.
And the French boss hit back with the response: "These debates that I hear are a joke, a farce".
"If I really cared, do you think I would have survived for 18 years?"
"I tried to text Paul this morning, but he was busy at work".
Wenger is no stranger to some left field statements of his own and although he took this response down a rather personal route, you can't blame him for throwing water on Merson's weird comments. Leicester City and Chelsea have all won the title in the last three years while the Gunners, who were serially finishing in the top four, dropped out to finish in fifth spot this season.
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