According to the club, the Spaniard has a groin problem after suffering a hamstring problem previously in a reserves game against Derby County at Pride Park.
Former Celta Vigo and Spanish Under 21 star Pablo has had his comeback comeback put back a number of times in the last few weeks after being out of favour with manager Joe Royle previously.
Earlier in the season a move back to Spain with Real Betis was rumoured to be happening, and with constant delaying of Pablo's return, it would be of no great suprise if Pablo has infact, been sold.