Two of West Brom’s key sponsors are considering withdrawing their backing of the club over the quenelle saga after primary shirt sponsor Zoopla, a property search engine co-owned by Jewish businessman Alex Chesterman, announced it would not be renewing its £3million contract at the end of the season.

Sponsors Jack Wolfskin and Holler watches have confirmed they may follow the example taken by Zoopla.

A statement issued by Jack Wolfskin read: “Jack Wolfskin is following the developments closely, but has not taken a decision yet.

“We consider the charges as serious and strongly disapprove of any gestures or statements which are meant to discriminate a single person, or a certain group of people.

“We are now awaiting the judgment of the Football Association before taking further steps.

“Depending on what our partner West Brom says, which measures they take and considering our legal possibilities, we would consider ending our sponsorship as one option.”

In its own statement, Holler said: “We will be reviewing the situation with regards to whether we extend that after this season.”

Kit supplier adidas will not be adopting such a stance, insisting it is firmly behind the club.

A spokesperson for adidas told Press Association Sport: “This is a disciplinary matter for the club and we remain fully supportive of West Bromwich Albion in handling this matter in conjunction with the FA.”