Manchester City's Sergio Aguero (right) fouls Chelsea's David Luiz (left) before being sent-off during the Premier League match at the Etihad Stadium, Manchester. (Photo by Martin Rickett/PA Images via Getty Images)

Manchester City's Sergio Aguero (right) fouls Chelsea's David Luiz (left) before being sent-off during the Premier League match at the Etihad Stadium, Manchester. (Photo by Martin Rickett/PA Images via Getty Images)