Wests Tigers will delay a decision on whether captain Robbie Farah plays against in-form Penrith in Saturday's NRL west Sydney derby clash.

The Tigers rake had scans on Tuesday which have revealed ligament damage to his elbow, placing him in doubt for the match at CUA Stadium.

Chris Corby, a product of the Tigers under-20 side last year is on standby for Farah whose injury will be re-assessed at training on Thursday.

"He's got some ligament damage and we're still weighing up whether he'll play or not," said Tigers coach Tim Sheens on Wednesday.

"It'll be another few days before we make a decision I would think.

"But tomorrow will give us a fair idea."

Farah would be keen not to miss any playing time as he bids to reclaim the NSW Origin No.9 jumper for the opening game of 2010 series in Sydney in just over four weeks.

He and Bulldogs hooker Michael Ennis, the Blues' incumbent, are again locked in a fierce selection battle.

They opposed each other last weekend when Farah was impressive but injured his elbow while Ennis took the points as the Bulldogs won and he scored two tries.

The Tigers, who will appreciate having prop Keith Galloway back from injury against a physical Panthers pack, always find it a hard slog playing at Penrith.

In fact Penrith have won 13 of their last 17 clashes at home while Wests Tigers haven't won there since 2006 when they got up 24-20.

The Tigers, however, have done a good job of reversing away trends this year with wins over Parramatta and Manly at grounds where their record was poor.

The Panthers are riding a wave of confidence after their third successive win, thumping the Warriors 40-12 in Auckland last weekend.

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