Dutch referee Danny Makkelie signals a penalty for Arsenal during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Javier SORIANO / AFP via Getty Images)

Arsenal's Spanish coach Mikel Arteta reacts during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Thomas COEX / AFP via Getty Images)

Atletico Madrid's Argentine forward #19 Julian Alvarez leaves the pitch during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Javier SORIANO / AFP via Getty Images)

Atletico Madrid's Spanish midfielder #06 Koke gestures to Dutch referee Danny Makkelie (L) after he withdrew a penalty following a VAR revision during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Javier SORIANO / AFP via Getty Images)

Atletico Madrid's Spanish midfielder #06 Koke gestures to Dutch referee Danny Makkelie (L) after he withdrew a penalty following a VAR revision during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Javier SORIANO / AFP via Getty Images)

Arsenal's Spanish coach Mikel Arteta stands on the sideline during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Thomas COEX / AFP via Getty Images)

Atletico Madrid's Spanish defender #18 Marc Pubill (L) and Arsenal's Belgian midfielder #19 Leandro Trossard (C) fall down to the ground while Atletico Madrid's Argentine forward #19 Julian Alvarez runs with the ball during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Thomas COEX / AFP via Getty Images)

Dutch referee Danny Makkelie shows a yellow card to Atletico Madrid's Slovak defender #17 David Hancko (C) during the UEFA Champions League semi-final first leg football match between Club Atletico de Madrid and Arsenal at the Metropolitano stadium in Madrid on April 29, 2026. (Photo by Javier SORIANO / AFP via Getty Images)