Rory McIlroy admits that he needs to improve his putting after the defending champion missed the cut at the UBS Hong Kong Open.
While former US Open winner Michael Campbell shot his lowest round for over six years to lead the competition, McIlroy crashed out after four-putting his final green to card a second round of 72.
The shock exit came five days after he clinched the European and US Tour money list double in Singapore, and the Northern Irishman says he needs to put in some practice hours before the start of the DP World Tour Championship in Dubai next week.
"I just got on a slide and couldn't stop it. Obviously not the week that I wanted," McIlroy said.
"I was only four off the lead and thinking I could make a couple more and be right back in contention. Unfortunately it just went the other way.
"I didn't putt well last week and sort of got away with it. This week was the same, so I think a bit of putting practice is required in Dubai.
"I think these couple of days off might actually do me good. It'll give me a chance to rest. I think if I was completely fresh I wouldn't have been making the mistakes.
"On the last I saw the projected cut was plus two, so I wanted to try to hole it (for birdie)."
McIlroy's 30-foot attempt caught the lip, but ran on five feet and he took three more.
Campbell, meanwhile, seems to be regaining some form after a lengthy barren spell. He missed 17 out of 18 cuts in a nightmare nine-month period, but came third in Portugal five weeks ago.
"I'm just happy to be in a position to have a chance. That's why we play the game. That's why I didn't give up," Campbell said.
He added: "There have been times where I wanted to throw it in. I remember I was back in Sydney (in 2008) said to myself, 'okay, tonight is when I decide whether I'm going to give up the game or keep on playing'.
"I woke up in the morning and there was something inside me that said, 'keep on going, you've still got the talent'. It never goes away - it just hides now and then."