The 21-year-old PGA Tour rookie surged to 20-under with two eagles in a closing 28, leaving Emiliano Grillo and Ben Kohles as his nearest challengers.

Percy eagled Gleneagles’ closing hole to catch Kelly at 8-under, leaving the final pair three shots clear ahead of Sunday’s final round.

A one-under 71 kept Shin firmly in control at Dundonald Links, where Pajaree Anannarukarn produced Saturday’s only bogey-free round to remain her nearest challenger.

The Australian recovered from two early bogeys to shoot 68 on a demanding King’s Course, with Jerry Kelly his closest challenger after 36 holes.

There have been 16 sub-60 rounds in PGA Tour history.

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