Lydia Ko's showed her world number one class to rocket into contention at the latest LPGA event in Phoenix.

The Kiwi golfer's returned to her best with a scintillating nine under par 63 third round, which included six straight birdies to close.

Ko moved from a share of 40th to sit in a share of seventh at 16-under par.

She is five shots off the lead held by Sweden's Anna Nordqvist, who outshone everyone with a remarkable course record 11-under par 61 to lead the tournament by two shots at 21-under par.

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Ko's rival for the world number one ranking, Thailand's Anita Jutanugarn, is in second spot.

Meanwhile Danny Lee has carded a one over par third round to be 13 shots off the overall lead at the PGA Tour's Arnold Palmer Invitational in Orlando.