ST KILDA'S medical staff will make a decision on Nick Riewoldt’s availability for round four on Wednesday.

The skipper was a late withdrawal from Friday night’s clash against Collingwood, allowing Paddy McCartin to come into the team and make his AFL debut.

“Nick developed some tightness in his calf early in his warm up on Friday night,” Barbour told

“That was in a different area to what he had during the week. He had a slight strain on his MRI and he’s settling well, but he will be tested mid-week.

“A decision will be made on Wednesday.”

UPDATED: Injury list

Fellow veteran Leigh Montagna will also face a fitness test on Wednesday to determine his availability for Saturday’s clash against Carlton in Wellington.

The 233-game on-baller had a minor knee operation on his meniscus following St Kilda’s NAB Challenge game against Hawthorn, and returned earlier than expected to face GWS in round one.

The 31-year-old did not travel to the Gold Coast the following week, and also missed Friday’s round three match against the Magpies.

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“Leigh developed some soreness after his game two weeks ago,” Barbour said.

“It is settling but again, he will be tested mid-week to see how it is functioning.”

Meanwhile, Sam Gilbert will return to the field for the first time since round 22 last year after recovering from a persistent foot injury.

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Gilbert has played146 games for the club since debuting in 2006, but only managed six matches in 2014 due to the same foot complaint.

Club doctor Tim Barbour is confident the 28-year-old defender is ready to return following an extended lay-off.

“Sam has had a long road in terms of his recovery,” he said.

“His recent progress has been uninterrupted and really positive. Sam is ready to return to playing in the VFL this week.”

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In other injury news, Jimmy Webster got through Sunday’s VFL game unscathed following a two-month lay-off with a broken finger.

Webster collected 15 disposals and played predominantly at half-back.

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Fellow left-footer Jack Lonie has also escaped injury following a nasty incident against Collingwood last Friday.

“Jack had an incident where he jarred his knee on the weekend,” Barbour said.

“He’s settling well and there wasn’t any swelling. It’s nice and stable. We expect him to be available.”

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Andrew Wallis and Tim Barbour assist Jack Lonie from the field after he jarred his knee on Friday night.