Thee stats suggest they did not try harder because a higher number of riskier shots would have shown up in more double bogey and eagles (two over or two under par. )

研究数据表明这些球手并没有在比赛中努力求胜，如果他们求胜心强、冒险出杆，应该会打出更多的双伯忌和老鹰球（高于标准杆两杆或者低于标准杆两杆）。 。

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Defending champion Matteo Manassero of Italy and seventh-ranked Martin Kaymer of Germany both shot two under par rounds of 70 to stay in contention.

CNN: STORY HIGHLIGHTS

Late Friday, McIlroy was tied for eighth at two under par.

WSJ: The PGA at Kiawah: Something in the Wind

The Ulsterman, who needs a top three finish at the 'Earth' course in Dubai to stand any chance of overtaking Germany's Kaymer, finished the day well adrift of the leading pack despite moving to two under par after shooting his lowest round of the tournament.

BBC: Ian Poulter moves into two-shot lead in Dubai