Golf-Spieth stays top a Masters despite late stumble (Reuters)

* Spieth drops three shots on last two holes

* Rookie Kaufman alone in second place

* German veteran Langer two strokes off pace (Updates at end of round)

By Steve Keating

AUGUSTA, Georgia, April 9 (Reuters) - Jordan Spieth withstood heavy winds and even stiffer challenges to remain atop the Masters leaderboard, and will take a one-shot lead into Sunday's final round as he bids to complete a successful defence of his Green Jacket.

The 22-year-old Texan has now held the outright lead for a record seven consecutive rounds and if he can remain there one more day will join Tiger Woods, Nick Faldo and Jack Nicklaus as the only men to claim back-to-back Masters wins.

Spieth, who began Saturday's third…