Adelaide forward Brett Burton has had more surgery on his troublesome left knee, ruling him out for up to six weeks.

Burton returned from the AFL club's training camp on the Gold Coast on Tuesday night after reporting lingering soreness following Saturday's pre-season Cup loss to Port Adelaide.

The 31-year-old saw a specialist on Wednesday morning and immediately underwent an arthroscopy to repair cartilage damage.

Crows football operations general manager Phil Harper said Burton was disappointed but remained positive about being ready for the start of the home and away season.

The Crows play Fremantle at Subiaco on March 28 in round one.

"Brett hasn't missed a beat with training over the summer and he approaches his rehabilitation with the right attitude, so we hope to have him back on the track as quickly as possible," Harper said.

"He will be in a race against time to be available for round one but we have faith in our physical performance team to give him the best chance possible of taking the field."

Burton ruptured the anterior cruciate ligament in his left knee in a match against Collingwood in July 2008 and underwent a full reconstruction.

He returned to the Crows line-up late last season.

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