Swansea skipper Matt Grimes admits Barnsley's "unique" playing style presents a difficult play-off challenge.
Barnsley finished one point above the Sky Bet Championship relegation zone last season, but the appointment of Valerien Ismael in October and the introduction of high-energy pressing tactics and a direct style transformed their fortunes.
The Tykes ended the 46-game campaign two points and one spot below fourth-placed Swansea and the sides meet in play-off action at Oakwell on Monday, with the return in south Wales on Saturday.
"They are certainly unique," midfielder Grimes said of Barnsley's approach. "They do play with high intensity, so we have to make sure we are ready for that.
"They have some very good players and a style that has hurt teams throughout the season. We just have to deal with it the best we can.
"They will want to press us and stop us playing, we will want to play through their press.
"It's a challenge for both teams and it will be an interesting match-up for sure."
Swansea beat Barnsley twice during the regular season, winning both games 2-0 on heavy winter pitches.
But Grimes does not read anything into those results, with conditions set to be completely different and limited crowds allowed to attend both games.
He said: "These play-off games stand on their own. The two games we had with them, the conditions and pitches were not ideal.
"Probably not as much football was played as there will be in the two legs coming up.
"I'm expecting different type of games, but there are things we need to take from the previous two to this one.
"But the two teams are in a completely different place to what we were in the season, so I don't think you can draw any conclusions from the two previous games.
"We'll also have fans at the games and we can't wait to play in front of the 'Jack Army' again.
"It gives me goosebumps just talking about it, but hopefully they can give us a real boost for the second leg."
Grimes was part of the Swansea side beaten by Brentford in the play-off semi-finals last season and much of Steve Cooper's squad that day remain at the club.
"The lads that were involved can use that feeling (of losing)," Grimes said. "You don't want to feel like that again.
"That can serve as motivation going into this one, but we have to be at the top of our game.
"This year we have gone from strength to strength as a team.
"We have had more points, more clean sheets, better defensive record, so from that point of view I do think we are better equipped this year."
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