The League Cup winners, who are level on points in the table with their opponents, beat the Baggies 3-1 earlier in the season.
The 28-year-old told the Swans' website: "It's going to be a tough game. We played some really good football in the reverse fixture at home and got the win. But Saturday will be a lot different.
"We are in a little battle with them in terms of league position and we will be looking to come away from there with something positive.
"It's down to us now to finish the season strongly. I don't know how high we can finish this year but we will just be taking each game as it comes and see where it takes us. But we can't ease off. If you do that, even for one game, then you will get punished. Hopefully we'll be on our game this Saturday."
Swansea have three wins in their last six Premier League games.