The Frenchman took to Twitter to explain he was using the same gesture after scoring against West Brom, which a French comedian uses in his act and had no intention to offend
The 34-year-old netted twice for West Brom at Upton Park - his first and second goals for the club since his arrival in the summer - but has received criticism for his actions after pulling his side level in the 40th minute.
Following the game, the Frenchman took to Twitter to explain his actions saying: "This gesture was just a special dedication to my comedian friend Dieudonne."
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"But it’s nothing to do with what’s been said. He’s dedicated it to a French comedian who he knows very well. It was a gesture he uses in his act.
"The speculation can stop now. It’s absolute rubbish. He’s totally unaware of what the problems were."
Since Steve Clarke’s sacking on December 14, West Brom have secured three draws under the guidance of Downing.
Former Real Betis coach Pepe Mel was interviewed for the vacant managerial position but talks broke down between the two parties on Friday evening.
"All I’ve been told is to carry on," Downing said. "If anything comes before that I’ll gladly step down and support the guy who comes in.
"I’ve had no real contact with the chairman. I know you guys had picked up on the Spanish chap [Pepe Mel] but he had the interview and was not for the club.
"It’s unwise for me to get involved with all that. Because I then get distracted and I don’t want that to transfer to the players. [I want] the players to know I’m fully focused on what I want to do."