Joe Mattock's loan move back to Portsmouth has been put on hold due to an injury crisis at West Brom.
Mattock, 21, returned to West Brom on 2 January following the end of his loan spell, having played seven times for Pompey and was expected to return.
But West Brom have now decided to retain the services of the defender until their injury crisis eases.
Mattock has represented England at Under-17, 19 and 21 level and began his career at Leicester.
He arrived at Fratton Park on 24 November, having worked with Pompey boss Michael Appleton at The Hawthorns.