The Trotters currently sit in 18th place in the Premier League, with just goal difference keeping them inside the relegation zone, so the match at the Reebok Stadium is a must-win for Owen Coyle’s men if they are to have any chance of staying in the division next season.
And the 35-year-old has issued a rallying cry to his team-mates, asking them to “stand up and be counted”.
"Sunday is a huge game for myself, one of the biggest games since I have been here," Davies told reporters.
"We know what is required. It is going to take people to stand up and be counted.
“It is a huge game and we will have to rally round and give everything."
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The Baggies, meanwhile, have been rocked by the news that manager Roy Hodgson will be leaving at the end of the season to fill the vacant England job, but Davies believes that the West Brom boss will be fully focused on his domestic duties for the remainder of the season and expects the opposition to be as much of a challenge as ever.
“I can't imagine he will be thinking anything other than West Brom," the veteran added.
"That is the kind of professional he is. He will want to go out on a high with them. We expect a tough game.
"They are in good form and it is going to be hard for us.
"We have to prepare right and make sure we go and do our business and take three points."
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