Rory McIlroy has outlined how he plans to combat his debilitating second-day syndrome.

The Northern Irishman seems to have developed an unhelpful habit of being great on Thursday and poor on Friday. Last week at the Scottish Open he carded a course-record 64 on the first day at Royal Aberdeen, but followed up with a 78.

A repeat at Royal Liverpool would be disastrous to his hopes of winning the Claret Jug this week as the weather is expected to take a turn for the worse on Friday and anyone not on top of their game is likely to be blown off course.

"I may be putting a bit too much pressure on myself, going out on Fridays and trying to back up a score," said McIlroy, whose first- round scoring average of just under 68 leads the PGA Tour but his second-round average is almost five shots worse.

"I have no problem shooting a low one on Thursday, there should be no reason I have any problem shooting a low one on Friday.

"I need to go out and pretend like it's a Thursday again. It's more going out and thinking about it and really trying to get off to a solid start instead of just going out and trying."