West Brom have contacted the police after Romaine Sawyers was racially abused online.
Midfielder Sawyers was sent a racist message on social media during Tuesday's 5-0 defeat to Manchester City.
Sawyers was at partially at fault for City's third goal as the struggling Baggies were thumped at The Hawthorns.
"West Bromwich Albion has today contacted West Midlands Police to report a racist message sent to Romaine Sawyers on social media," a club statement read.
"Everyone at the club is appalled by the abhorrent message which was sent during Tuesday's Premier League fixture against Manchester City.
"The club has a proud history of confronting all forms of discrimination and will assist the authorities with their inquiries, seeking the toughest available legal punishment, as well as a lifetime ban from The Hawthorns for the individual responsible.
"Albion will offer Romaine the relevant support required at this time and continues with its long-standing commitment to help rid football of racism.
"There is No Room For Racism. Anywhere."