Kyle Edmund doubt for Australian Open

British number one Kyle Edmund may be a doubt for the Australian Open after pulling out of the Sydney International with a knee injury.

The 23-year-old Yorkshireman, ranked 14th in the world, reached his first Slam semi-final at last year's tournament.

The Sydney International was set to be Edmund's final tournament before the first Grand Slam of the year, which starts in Melbourne on 14 January.

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