Mauricio Pochettino was in “shock” at his two-game touchline ban following his confrontation with Mike Dean.
The Tottenham manager was involved in an altercation with Dean, the referee, following their 2-1 defeat to Burnley in the Premier League.
Pochettino apologised for his behaviour and admitted he had “crossed the line”.
The Spurs boss was hit with a two-match touchline ban and £10,000 fine for the post-match row with the referee.
Even though the 47-year-old accepted the charge, he felt the touchline ban was unfair.
“I am in shock,” Pochettino said in a press conference. “I still think it’s unfair. I can do nothing.
“I still need to see the reasons but the letter has still not arrived. I am suspended for two games.
“This is my seventh season in England. You can see how I’ve behaved since day one.
“I was always a player, coach, who wanted to help the FA. Always try to behave in my best.
“I think always I was always so implicating to improve everything.
“It’s my first time here when I’m not completely right in my behaviour but I fee that it’s too much.
“I feel a bit sad with the punishment.
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“I need to wait and see what they put on the letter and the reasons to ban me with two games. That is unbelievable, no?
“I think we are waiting after Wednesday the letter from the FA but it’s still not arrived.
“I’m so curious to see why they decided to do what they did. (A) two game ban is completely unfair and I want to see why and then talk a bit more.”
The ban means Pochettino will be in the stands for Tottenham’s Premier League matches at Southampton on March 9 and Liverpool on March 31.