Matthew Pennington and Matthew Kennedy have both been recalled from their loan spells at Tranmere Rovers.
The pair joined the League One side on initial 28-day deals in January, agreements which were later extended by a further month.
Both have now returned to Finch Farm where they have rejoined Alan Stubbs’ Under-21s squad in time to travel to Norwich for Tuesday evening's fixture.
Centre-half Pennington scored one goal in nine appearances, while winger Kennedy was involved in eight games.
The duo’s final outings for Tranmere was in the 3-1 win at home to Coventry City on Saturday.
Tranmere assistant boss John McMahon said: "Kennedy and Pennington have been recalled to strengthen their development squad.
"It is a blow because they're two very good lads and two very good players.
"The two kids who have been fantastic around the place, it's a credit to the way they've been brought up.
"And a big thank you to Roberto for allowing them to come out to us."