Real Madrid's Belgian goalkeeper #01 Thibaut Courtois gestures after recovering from an injury during the UEFA Champions League first round day 1 football match between Real Madrid and Inter Milan at the Santiago Bernabeu stadium in Madrid on September 8, 2026. (Photo by Thomas COEX / AFP via Getty Images)

Borussia Dortmund's Greek midfielder #19 Konstantinos Karetsas receives medical attention after injury during the UEFA Champions League - League phase, Matchday 1 - football match between BVB Borussia Dortmund and Villarreal CF in Dortmund, western Germany, on September 8, 2026. (Photo by Sascha Schuermann / AFP via Getty Images)

Polish referee Szymon Marciniak presents a yellow card to Manchester City's Croatian defender #24 Josko Gvardiol during the UEFA Champions League first round day 1 football match between FC Porto and Manchester City at Dragao stadium in Porto on September 8, 2026. (Photo by PATRICIA DE MELO MOREIRA / AFP via Getty Images)

Real Madrid's Moroccan forward #21 Brahim Diaz kicks the ball during the UEFA Champions League first round day 1 football match between Real Madrid and Inter Milan at the Santiago Bernabeu stadium in Madrid on September 8, 2026. (Photo by Thomas COEX / AFP via Getty Images)

Manchester City's Portuguese midfielder #27 Matheus Nunes (2R) reacts during the UEFA Champions League first round day 1 football match between FC Porto and Manchester City at Dragao stadium in Porto on September 8, 2026. (Photo by PATRICIA DE MELO MOREIRA / AFP via Getty Images)

Borussia Dortmund's Greek midfielder #19 Konstantinos Karetsas lays on the pitch after injury during the UEFA Champions League - League phase, Matchday 1 - football match between BVB Borussia Dortmund and Villarreal CF in Dortmund, western Germany, on September 8, 2026. (Photo by Sascha Schuermann / AFP via Getty Images)

Real Madrid's French defender #16 Ibrahima Konate (L) vies for the ball with Inter Milan's Argentine forward #10 Lautaro Martinez during the UEFA Champions League first round day 1 football match between Real Madrid and Inter Milan at the Santiago Bernabeu stadium in Madrid on September 8, 2026. (Photo by Thomas COEX / AFP via Getty Images)

Real Madrid's Belgian goalkeeper #01 Thibaut Courtois (L) reaches for the ball as Inter Milan's Argentine forward #10 Lautaro Martinez attempts to score during the UEFA Champions League first round day 1 football match between Real Madrid and Inter Milan at the Santiago Bernabeu stadium in Madrid on September 8, 2026. (Photo by Thomas COEX / AFP via Getty Images)