Celtic hope to sign Ajax winger Derk Boerrigter ahead of this week's Champions League qualifier against Elfsborg.
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Boerrigter, who has a year on his current contract, is in Glasgow for signing talks ahead of a £3m move.
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The 26-year-old is in his second spell at Ajax having re-signed in 2011.
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He scored six goals last season and helped the club win their 32nd Eredivisie league title.
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Boerrigter has also enjoyed spells with Zwolle and RKC Waalwijk.
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Celtic have until midnight on Tuesday to add a "wildcard" signing eligible to play in Wednesday's first leg of the Champions League qualifier at Celtic Park.
Every club wants to sign new players nowadays cos so many teams need fresh legs in their squad. I totally support this...