The Blues head for The Hawthorns knowing victory would seal the Premier League title.
But Pulis says the Baggies cannot afford to roll over and allow Antonio Conte’s men to cruise to victory.
“We'll give it our best,” said Pulis.
“We have a responsibility to our supporters. We're still chasing a points tally that will keep us in eighth position so we have a lot to play for.
EPA
Antonio Conte's side need three points to claim the Premier League title
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“We're looking forward to the game, the players have been very good this week.
“You've got to give Antonio and the players a great chance of lifting the double.
“They deserve to be where they are, they've been the most consistent team in the league this year and they come to our place with a chance of winning it.
“They deserve a lot of credit.
“Whether they celebrate on our pitch or back at Stamford Bridge, they deserve to be where they are for what they've done so far.”