UK Championship: Un-Nooh did not know about missed 147 cash

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History repeating itself: Un-Nooh misses final black in 147 bid back in December

Thailand's Thepchaiya Un-Nooh fluffed a maximum 147 break by missing the final black - and said he did not know he had squandered £44,000.

Un-Nooh had been set for the cash prize in the sixth frame of his third-round tie with 2013 champion Neil Robertson at the UK Championship in York.

But the 30-year-old world number 36 said: "£44,000? I wish you'd told me before the black.

"There was too much pressure," said Un-Nooh, who was knocked out 6-2.

"I am so disappointed. I have never done a 147 in a big tournament like this before."

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UK Championship: Neil Robertson wins after 145 break

Australian world number three Robertson said he was "absolutely gutted" for his opponent.

"Poor Thepchaiya," he said. "That prize would have meant a lot to him.

"But I am delighted to win. I was 3-1 up and should have been 3-1 down. I am feeling really good.

"My game is definitely there and now I need to put it together at the business end of the tournament."

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