Rocha boost for Pompey
Portsmouth defender Ricardo Rocha has been passed fit for the clash with fellow npower Championship strugglers Doncaster.
The Portuguese centre-half will be available after shaking off the calf injury he suffered during the 1-0 home defeat by Millwall on Tuesday night.
Tal Ben Haim remains on the sidelines with a calf injury and fellow defender Aaron Mokoena has an ankle problem.
Veteran striker Kanu has returned to training following a back injury but is not expected to be involved.
Pompey are currently nine points from safety with four matches remaining.
Rovers, bottom of the table and two points behind, will be relegated unless they win while even a victory would not save them if Bristol City beat Birmingham.