Arsenal are yesterday's news after he shot down reports of a potential switch to the Gunners. The 24-year-old was once on Celtic 's signing radar and he was Brendan Rodgers and Lee Congerton's No.1 transfer target with a reported £8m bid being turned down by Atalanta in 2019.
And the Belgium international has only added to his burgeoning reputation over the past 18 months with the rampaging wing back key to the Serie A upstarts' run to the last eight of the Champions League.
Castagne is expected to command a fee upwards of £20m this summer and the likes of Paris Saint-Germain are reportedly keen on securing his services.
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