(CNN)  -- Luke Donald demands perfection of himself and his caddy on the golf course, so when CNN presenter Shane O'Donoghue was given the chance to carry the world No. 1's bag for a few holes, he knew the learning curve would be steep. Donald reached the top of the rankings earlier this year by winning the PGA Championship at Wentworth -- despite the best efforts of O'Donoghue to derail his effort in a practice round for the European Tour's prestige event. Donald's regular caddy John McClaren was on hand to give some useful tips, but it appeared wasted on the Living Golf host.
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Living Golf presenter Shane O'Donoghue tries his hand as Luke Donald's caddy
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The Irishman discovers the pitfalls of the job in a few holes at Wentworth
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Later that week Donald takes over as world number one from Lee Westwood
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Donald's regular caddy John McClaren succeeded golfer's brother in carrying his bag
Luke Donald
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Luke Donald
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His yardage advice also fell short of expectations when @placeholder hit an approach into a bunker, but saved his par with a superb up and down from the sand.
Luke Donald
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Luke Donald
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But a rare error off the tee at the par-five 18th at Wentworth left @placeholder in the trees until he brilliantly engineered another miraculous recovery.
John McClaren
John McClaren
"He's one of the best players in the world at getting up and down from off the green," chipped in @placeholder.
Living Golf
Living Golf
By then O'Donoghue was back to doing what he does best, presenting @placeholder.