Ojo has suffered a fracture in his back.
The side have made a mixed start to the new Championship season.
Lilywhites skipper Tom Clarke is reportedly wanted by Championship rivals Wednesday and Blackburn.
Crystal Palace have been chasing Liverpool striker Christian Benteke all summer long.
The Italian goalkeeper's distribution let him down again
West Ham United striker Andy Carroll says Slaven Bilic doesn't need to make any more signings before the summer transfer window slams shut.
Leeds United drew 1-1 with Fulham at Elland Road last night.
Tottenham Hotspur’s Dele Alli and Ross Barkley of Everton are two of the most talented young players in the Premier League.
HITC Sport understands that Benfica have agreed to move
The forward is reportedly on the verge of joining Mark Warburton's Glasgow Rangers.