The Argentinian pair have not featured for the first team this term, following Dean Henderson's return from two loan spells with Sheffield United and the expiration of Rojo's temporary stint with Estudiantes in his homeland.
The defender has made one appearance with the Under-23s, against Everton back in October.
The South American pair still have deals until the end of the current 2020/21 campaign but will be attracting interest from other clubs before the transfer deadline on 1 February.
“Both of them have contracts until the summer and they're not going to be extended,” confirmed the manager at his press conference to preview Saturday's Emirates FA Cup third-round tie with Watford.