Allen, starting the final round two shots back, reeled off five consecutive birdies on the front nine to charge into the lead. He held sole possession of the top spot until the 16th, when he carded a bogey to allow Langer to pull even at 11-under-par 205.
Langer bogeyed the 16th and parred the last two holes to end at minus-10, handing the title to Allen, who finished the final round with a 5-under 67.
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