New Zealand captain Kane Williamson ruled out of the two-test series against Proteas

New Zealand have brushed off concerns that captain Kane Williamson could be permanently plagued by his long-standing elbow injury.

Batsman Williamson was ruled out of the two-test series against South Africa scheduled for later this month after having to sit out the series against Bangladesh.

The 31-year-old has carried the tendon injury for over a year, forcing him to miss plenty of cricket.

"We are very confident it will get right completely," New Zealand head coach Gary Stead told New Zealand media on Tuesday.

"A lot of tendon injuries like this, they do linger for a while. At the moment, he has been somewhere around 14-15 months.

ALSO READ: Simon Harmer’s Proteas Test cap not yet ready for the beach bar ...

"They say they are usually gone in about 18 months' time, so let's hope that is the case with Kane."

Stead said surgery was not an option for Williamson, who rather needed "gradual and consistent loading" to get back to full fitness.

"He's back batting, he's batting for periods of 20-25 minutes this week," he added.

"But the thought of him batting for four or five hours in a test match probably means a good chance he goes backwards again."

Williamson is targeting a return for short format matches against the Netherlands from late-March though his Indian Premier League commitments with Sunrisers Hyderabad could influence that.

Stead said it was still too early to tell where and when the skipper would return for New Zealand.

ALSO READ: Simon Harmer and Ryan Rickleton warm-up for Proteas tour to New Zealand with star performances

With Williamson resting and veteran batsman Ross Taylor now retired from international cricket after the Bangladesh series, New Zealand are short of 198 tests of experience.

Stead confirmed