West Bromwich Albion will investigate crowd disturbances that occurred during Friday's 1-0 loss to Chelsea, who clinched the Premier League title with the victory, after media reports said that West Midlands Police arrested nine men for misconduct.

Mauricio Pochettino's men have fallen seven points behind leaders Leicester City, with three games remaining, following 1-1 draw against West Bromwich Albion.

Arsenal forward Alexis Sanchez struck twice before half-time to secure a 2-0 win over West Bromwich and move past Manchester City to the number 3 spot in the English Premier League.