Charlie Mulgrew says Celtic need to sign two wingers - changing his recent assessment of the situation.
The former Parkhead defender had forecast that his old club would need to bring in one more wideman before the closure of the transfer window.
But that was with the expectation that new recruit Benjamin Nygren would play on one side. However, after watching the Swede play in central midfield against Ajax, that has forced him into a rethink.
Celtic have already sold Nicolas Kuhn in this window and Yang has been linked with an exit, with Brendan Rodgers playing down the chance of him leaving.
They've been on the trail of Michel-Ange Balikwisha and Jakob Breum but it remains to be seen if they can get deals done. Mulgrew would like to see both.
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"I said last week they need a winger," he told Go Radio.
"After playing Ajax you seen Nygren playing as a kind of No8 midfielder. So you are thinking is that where he is going to play? So then you would think they need two wingers.
"So I can understand why they wouldn't let Yang go. You can't let a winger go when you've not got any in the building or wingers ready to start and make an impact.
"If Nygren is going to play as a No8 in the midfield area - I thought he came as a winger - then you need another two wingers.
"So you need to keep a hold of Yang until you get replacements."