West Bromwich Albion manager Slaven Bilic says he is "really disappointed" Ahmed Hegazi was allowed to leave the club and that he was assured the defender would stay.
Hegazi, 29, has moved to Saudi Arabian club Al-Ittihad on loan but will sign permanently at the end of the season.
Bilic said the Egypt central defender had been part of his plans for Monday's 1-1 draw at Brighton.
"He has experience. He is a top professional," Bilic told BBC Sport.
Hegazi made his first start of the season for West Brom in the 0-0 home draw with Burnley on 19 October.