Last updated on .From the section Cricket

Ryan Harris

Australia fast bowler Ryan Harris is expected to be out for six months following a knee operation.

Harris, 34, played a key role in Australia's recent series win in South Africa and the 5-0 Ashes victory over England.

"Ryan will be on crutches for a few weeks and we expect a long rehabilitation period," said Australia physiotherapist Alex Kountouris.

"Hopefully he will be fit to play against Pakistan [in October]."

Harris has struggled with injury throughout his career and had never played four Tests in a row until the 2013 Ashes in England.

However, the final Test against South Africa last week - in which he claimed seven wickets to seal a series win - was his 12th in succession.

He has taken 103 wickets external-link at an average of 22.56 in 24 Tests.

Australia play two Tests against Pakistan in October, likely to take place in the United Arab Emirates, followed by a four-Test series at home to India later in the year.