Defender Sean Morrison has completed a medical ahead of his proposed move to Cardiff City.
The Bluebirds and the centre-back still have to finalise personal terms.
Morrison, 23, who joined the Royals from Swindon in 2011, told manager Nigel Adkins that he wanted speak to Cardiff despite being part of the Berkshire club's long-term plans.
He signed a contract extension in December 2013 and has started in both of Reading's games this season.
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