'The addition of trees at No. 11 continues our longstanding emphasis of accuracy off the tee,' club chairman Hootie Johnson said.
The 11th hole already was one of the toughest at Augusta National, stretched to 490 yards two years ago during the largest overhaul in club history.
'If you were up the right side, you still had an open shot to the green,' Weir said Friday when told of the changes. 'Now, it's going to be a pitch out.'
The only other change announced by the club was a rebuilt green on the par-5 13th.
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