Rory McIlroy lashed out on Twitter today after BBC golf commentator Jay Townsend ripped his Irish Open first-round performance.

"McIlroy's course management was shocking. Some of the worst course management I have ever seen beyond under-10 boys' golf competition." Townsend tweeted.

"Shut up ... you're a commentator and a failed golfer, your opinion means nothing!" McIlroy tweeted back.

“Well, I stand by my caddie” McIlroy added.

“Sorry, but I stand by my comments,” Townsend replied.

Townsend is an American who formerly played on the European Tour and now works for BBC Radio.

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