Borussia Dortmund are in pole position to retain the Bundesliga, but boss Juergen Klopp is worried that goal-hungry Schalke are possible party-poopers in this weekend's big European match.
Dortmund's free-scoring young team are six points clear of second-placed Bayern Munich with four games remaining after a 1-0 win over the Bavarians last weekend.
But Schalke also like a goal or three and, despite a 4-1 loss to Nuremburg, their recent streak has put them third and all-but qualified for next season's Champions League.
"In terms of the table, we are in the lead, but on Saturday we expect another intense game," said Klopp.
"(Schalke) want to make sure of their Champions League place for next season and they will certainly want to spit in our soup."
"We are just thinking about the next game, we have had three days to enjoy the victory (over Bayern), but after that we have another tough match ahead of us.
"We aren't there yet and, unfortunately, a lot can still happen."
Dortmund's win over Bayern was their fourth in a row against the Bundesliga record holders, only the second time such a run has happened in Germany, after Werder Bremen in the early Nineties.
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