Sunderland hopes of signing permanently Ki Sung-yeung could be scuppered by events at Swansea City.
Swansea sacked manager Michael Laudrup last night.
Ki, midway through a successful loan spell at the Stadium of Light, would cost around £6million.
The shock sacking of Laudrup has thrown more doubt around a deal - the two sides failed to negotiate during the transfer window, says the Daily Mail.
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