Sydney FC consider new signings to reverse form slump Sore again: Alessandro Del Piero. Sydney FC will consider signing new players during the January transfer period in a bid to end their form slump, but chief executive Tony Pignata says adding new players will be difficult as the club already has a full roster. The Blues have already filled their allocated squad places and have also signed one player, Matt Thompson, as a long-term injury replacement. But the club's recent poor run of form has prompted it to consider bringing in another player during the transfer period. Pignata and coach Frank Farina will meet early in the new year to discuss player signings - both contract renewals of existing players and potential recruitments. However, the Sydney chief executive said any move would be subject to players being sold or seeking a move elsewhere as there were no free spots available. The club will begin contract talks with any affected players in January. "We're identifying who we're going to speak to, but at this stage we haven't gone out and signed them," Pignata said. We are intending on doing that in January. 'I'll speak with Frank then and see what changes he might want to make, but the transfer window doesn't open until January 14. Sydney FC have been linked with former Central Coast Mariners and current Guangzhou R&F defensive midfielder Rostyn Griffiths, who is understood to be looking to move back to the A-League. Pignata said he had not yet talked to Griffiths. "Rostyn is back but I don't know where he's at, and we haven't spoken to him," Pignata said. Meanwhile, Pignata said Alessandro Del Piero's withdrawal at half-time during the Blues' 5-2 loss at home to Brisbane Roar was due to a recurrence of a niggling back injury. Del Piero was expected to last up to an hour against the Roar, but was forced out of the contest after again suffering back pain. "His back seized up and he left; he couldn't go on," Pignata said. He's better but not 100 per cent ... He looks after himself so he will know.