Pompey's injury problems continue to mount after Brett Pitman today underwent a knee operation
And the Blues' leading scorer is expected to be sidelined for up to four weeks.
The nine-goal striker went under the surgeon's knife to remove a piece of floating tissue.
The problem has dogged Pitman for the past month, yet he has continued to put in his goal-scoring performances.
However, it has been decided to now operate, ruling him out for an estimated 2-4 weeks, depending on how swiftly the knee settles.
On Monday, Pitman had an operation on the broken nose he sustained against Fleetwood last month.