Erling Haaland - Any club wishing to sign the prolific Norwegian is going to have to seriously test Borussia Dortmund's resolve to keep their man. The German club have left no ambiguity in their messages to would-be suitors that they are prepared to miss out on a huge transfer fee for Haaland, 20, in order to keep him at Signal Iduna Park for another season. Haaland, who is also wanted by a posse of Europe's top clubs, will be available for around £70 million next summer due to a release clause in his contract.

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