Lucas Silva is unlikely to join Real Madrid in January with the Spanish giants not planning to make any transfers.
Ravel Morrison has returned to parent club West Ham from Cardiff City on compassionate leave.
Cardiff have announced the signing of defender Juan Cala on a two-and-a-half year contract.
The 24-year-old had his contract with Sevilla terminated last weekend, with the Spanish club confirming he was moving to Cardiff.
Cala has trained with his new team-mates throughout the week and is available for selection in Saturday's south Wales derby against Swansea.
A Cardiff statement said: "Cardiff City Football Club can confirm that Spanish defender Juan Torres Ruiz Cala has officially joined the club on a two-and-a-half year deal."
Cala is Ole Gunnar Solskjaer's seventh signing following the arrivals of Magnus Wolff Eikrem, Mats Moller Daehli, Jo Inge Berget, Fabio, Kenwyne Jones and Wilfried Zaha.