Claude Puel insisted that referee Lee Probert Demarai Gray book a tribute to the deceased Leicester owner, Vichai Srivaddhanaprabha, in honor of his honourary celebration.
Gray hit a 55th-minute winner on an emotional afternoon in Cardiff and tagged him by taking off his shirt and revealing an undershirt with the inscription "For Khun Vichai".
Thai businessman Srivaddhanaprabha and four others were killed in a helicopter crash last weekend before King Power Stadium, shortly after Leicester West Ham had played.
Lee Probert was right to strip Demarai Gray for his shirt, Claude Puel believes
Gray praised Vichai Srivaddhanaprabha and Probert was criticized for being careful
Gray's posting under the Disciplinary Protocol sparked heated debate over social media. Many fans thought that Probert should have ignored the letter of the law and should not have wavered the yellow card in light of the extremely stressful and emotional circumstances.
Leicester fan and Match of the Day presenter Gary Lineker called it a "stupid law" on his Twitter account. It has always been the day to get upset about something so insignificant. "
Leicester coach Puel said: "We played like professionals and it was important that the referee was also professional.
"He knows the rules and it was important that Demi take this yellow card.
"It was the only time I accepted a yellow card from my player. It was very emotional. "
Foxes boss Puel said that Probert was right, despite the event, to remain professional
Leicester's players wore T-shirts with a picture of Srivaddhanaprabha's face and the words "The Boss" during the pre-game warm-up, the title he knew at King Power Stadium.
The fans wore identical off-end T-shirts, and the entire Leicester team, playing the team and back room, stood in the center of the circle for a minute before kicking off.
Both groups of supporters unfurled huge banners in honor of Srivaddhanaprabha, and it was clear how much the goal of Gray and the victory at the final whistle meant for Leicester when they took the applause of their traveling fans for five minutes.
"It was great to see this result with the fans at the end, because it was the whole family that should honor our chairman," Puel said before he and the players took a 13-hour flight to Bangkok to attend Srivaddhanaprabha's funeral participate.
Leicester spent five minutes with his fans at the end of the game to celebrate the victory
It was an emotional afternoon, and Puel's team now travels to Vichai's funeral in Thailand
"It was hard all week. We went on step by step, we came back to training and worked together.
"We have all seen honors before the game, we share many feelings and it is important to continue the work and find the right balance.
"We'll see how we get along next week because it gets difficult.
"We come back in the middle of the week, then we have to prepare for a game [against Burnley] in front of our fans.
"It's going to be difficult, but we took the first step today and now have to do the right thing the next week."
Neil Warnock was glad that the "surreal" week was over when Cardiff fell into the bottom three
Cardiff dropped below the last three when Newcastle climbed above them as they defeated Watford for their first win of the season.
"It was a strange week, really surreal, I'm glad I'm honest," said manager Neil Warnock.
"The players gave it all, but it was difficult this week, especially for three or four boys.
"I do not know if it triggered things, but the training was not the same and we had to have a word with them that we had to play the game."