Chelsea manager Antonio Conte reacts after David Luiz was shown a red card (Reuters)

Referee Michael Oliver shows a yellow card to Arsenal's Mohamed Elneny during the English Premier League soccer match between Chelsea and Arsenal at Stamford Bridge stadium in London, Sunday, Sept. 17, 2017. (AP)

Arsenal manager Arsene Wenger after Chelsea's David Luiz was shown a red card (Reuters)

Real Madrid's Gareth Bale scores during the Spanish La Liga soccer match between Real Madrid and Real Sociedad, at Anoeta stadium, in San Sebastian, northern Spain, Sunday, Sept.17, 2017. (AP)

Real Madrid's Lucas Vazquez, center, celebrates his goal after scoring during the Spanish La Liga soccer match between Real Madrid and Real Sociedad, at Anoeta stadium, in San Sebastian, northern Spain, Sunday, Sept. 17, 2017. (AP)

Real Madrid players celebrate their first goal during the Spanish league football match Real Sociedad vs Real Madrid CF at the Anoeta stadium in San Sebastian on September 17, 2017. (AFP)

Real Madrid's Isco, duels for the ball with Real Sociedad's Asier Illarramendi, left, during the Spanish La Liga soccer match between Real Madrid and Real Sociedad, at Anoeta stadium, in San Sebastian, northern Spain, Sunday, Sept. 17, 2017. (AP)

Chelsea manager Antonio Conte reacts while Arsenal manager Arsene Wenger looks on after David Luiz was shown a red card (Reuters)