Watson leads after birdie blitz

Bubba Watson makes five consecutive birdies on the back nine of his second round to lead the Masters by three shots.

The American 2012 champion picked up shots at the 12th, 13th, 14th, 15th and 16th holes for a spectacular four-under 68 to lead the tournament at the halfway stage on seven under.

Watson will tee off in Saturday's final group with Australian John Senden as he seeks his second Green Jacket in three years.

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