NORTON, Mass. (AP) — Luke Donald has apologized for criticizing golf course architect Gil Hanse in a tweet that was meant to be private.

Donald made bogey on the par-5 18th hole at the TPC Boston, where Hanse reconfigured the green with severe slopes off the edges. He thought he was sending a direct message Saturday night, but instead the very public tweet started with Donald’s cell phone number and then said, “Gil Hanse is a (expletive). Haha.”

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Within minutes Donald deleted both tweets.

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Donald says it was a mistake that he takes full responsibility. He apologized Sunday to anyone offended, starting with Hanse.

He also received countless phone calls after he published his number. Donald said, “That’s what I deserve.”

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Copyright 2012 The Associated Press.