Swansea boss Michael Laudrup feels striker Romelu Lukaku is the main threat to his side when they face West Bromwich Albion on Saturday.
The 19-year-old Belgium international also scored Albion's goal when they were beaten 3-1 at the Liberty Stadium earlier in the season.
"They have talent and speed up front with Lukaku and we are aware of that, especially in transition and on the counter-attack," said Laudrup.
"They will be playing at home but we always like to have the ball, so we have to be careful there because we know Lukaku is so fast.
"He means they can go with two or three passes and move from their 18-yard box to ours in three seconds if we give the ball away.
"They are a strong side. We are two of the major surprises in the league this season - we both have 40 points with 10 games to go - and nobody could have thought that back in August."