Carlisle boss Graham Kavanagh is hoping to further strengthen his squad after seeing them lose 2-1 at Bristol City.
Manchester United loanees Sam Byrne and Charni Ekangamene made their debuts for the Cumbrians, but City's two half-time substitutes, Marvin Elliott and Wes Burns, transformed their side, with the former scoring twice in the space of three minutes.
Carlisle went in front after 36 minutes when a crude foul by Adam El-Abd on Charni Ekangamene was punished by a sweet low free-kick from Brad Potts that just eluded debutant goalkeeper Simon Moore.
But midfielder Elliott made an immediate impact with some strong challenges and headed City level from Sam Baldock's 68th-minute cross after the visitors had failed to clear a corner.
Another Jay Emmanuel-Thomas corner from the right was allowed to reach Elliott, who volleyed powerfully past Greg Fleming from eight yards in the 70th minute.
Kavanagh said: "We have to defend set-pieces better. To be undone by two, having played so well was very frustrating.
"We were without striker Lee Miller because his girlfriend has just given birth and we missed his height defending corners.
"There were a lot of good things in the game from our point of view. But Bristol have a lot of quality players, despite their league position, and we knew they would pose a threat.
"We just have to dust ourselves down and go again. I want to strengthen through the emergency loan period and hopefully there is money available to do that."
City were pedestrian and gave the ball away repeatedly in the first half and were lucky in the 12th minute when Michael Drennan intercepted a poor pass from Derrick Williams and lashed a 20-yard shot against the crossbar.