David Luiz of Chelsea heads for the ball during the English Premier League match between Chelsea and Arsenal at the Stamford Bridge Stadium in London, Britain on Feb. 4, 2017. Chelsea won 3-1. (Xinhua/Han Yan)
David Luiz of Chelsea heads for the ball during the English Premier League match between Chelsea and Arsenal at the Stamford Bridge Stadium in London, Britain on Feb. 4, 2017. Chelsea won 3-1. (Xinhua/Han Yan)