Why Tigres Played With One Less Player: The New "Cover Your Mouth" Rule

What Happened in the Tigres vs Xolos Match

Tigres played a good part of their match against Xolos de Tijuana with one less player. This was because Rodrigo Aguirre was sent off (kicked out of the game) near the end of the first half.

But here is the surprising part:

• It was not because of a hard foul.
• It was not because of a hit or tackle.
• It was because of a new rule that was first used in the 2026 World Cup and has now arrived in Liga MX (Mexico’s top soccer league).

How the Red Card Happened

Here is the step-by-step of what went down:

1. Around the 45th minute, Rodrigo Aguirre (nicknamed "Búfalo") had an argument with defender Alejandro Gómez.
2. While they were having this unfriendly exchange, the Uruguayan forward covered his mouth with his hand.
3. The referee, Ismael Rosario López Peñuelas, decided to check the VAR (Video Assistant Referee — a helper system that lets refs review video).
4. After watching the video, the referee showed Aguirre a red card (the card that sends a player off) for covering his mouth "in a conflict situation," as he explained on the local audio after the review.

Important Point: Covering your mouth during an argument with an opponent can now get you instantly sent off under the new rule!

Why Was Búfalo Aguirre Expelled?

The IFAB (International Football Association Board) is the group that decides the rules for soccer around the world — including the World Cup. For the 2026–2027 season, they added a new expulsion rule:

• Any player, substitute, or subbed-out player must be sent off if they cover their mouth while talking to an opponent in a provocative, disrespectful, or heated way.

The official rule says:

"The player, substitute, or substituted player must be expelled if they commit any of the following infractions: (…) covering the mouth when communicating with an opponent in a provocative, contemptuous, or inflamed manner."

What Is This Rule Called?

This is known as the Ley Vinícius or Ley Prestianni (Vinícius Law or Prestianni Law).
It was created after a racist incident where Gianluca Prestianni targeted Vinícius Jr. during a Champions League match last season.

Rodrigo Aguirre arguing with Alejandro Gómez (Imago7)

Summary

Tigres had to play with one less player against Xolos because Rodrigo Aguirre covered his mouth during an argument with an opponent. This triggered a new rule from IFAB that was used in the 2026 World Cup and is now in Liga MX. The rule says covering your mouth to talk badly or heatedly to a rival means an automatic red card. It is also called the Ley Vinícius or Ley Prestianni after a past racist incident in the Champions League.

FAQ

1. What does "sent off" or "red card" mean?
It means the referee shows a red card and the player must leave the field immediately, leaving their team with one fewer player.

2. What is VAR?
VAR stands for Video Assistant Referee. It is a team of refs who watch the game on video and help the main referee review important decisions.

3. Why is it called the Ley Vinícius or Ley Prestianni?
Because the rule was made after Gianluca Prestianni acted in a racist way toward Vinícius Jr. in a Champions League game, and lawmakers wanted to stop similar disrespectful behavior.

4. Does this rule apply to all soccer leagues?
The rule was added by IFAB for the 2026–2027 season and was used in the 2026 World Cup. Liga MX has already started using it, and other leagues are expected to follow.