Video footage emerged last night of fans being beaten with batons after the match, but fans have also said that the aggressive tactics were in place before the match.
"The club has been made aware of some issues experienced by our supporters accessing the stadium tonight," Chelsea posted onl Twitter on Wednesday.
14 March 2018
"A spokesman said: 'We are aware of reports of incidents outside the ground before the game where a number of Chelsea fans were hurt.
"'We ask that our supporters contact us with accounts of their experiences of this evening's arrival at the stadium so that we can take this up properly with the authorities.'"
14 March 2018