Rory McIlroy admits there will be no excuses if he does not give himself a chance to complete the third leg of a career grand slam in the US Masters this week.

McIlroy has won the US Open and the US PGA Championship and finished third in the 2010 Open at St Andrews, but his best finish at Augusta National remains a tie for 15th in 2011, when he led by four shots going into the final round but crashed to a closing 80.

"Mind, body, equipment, it's all there. There's no excuses," McIlroy said. "There's no excuses if I don't play well this week.

"Everything's in the right place to allow me to play well so it's just a matter of managing my expectations, not getting ahead of myself, not thinking about Sunday when it's only Friday afternoon.

"Just really keeping myself in the present and in the moment and trying to take it one shot at a time and hopefully those shots add up to about 270 and I walk away with a green jacket.

"It's just about not getting ahead of yourself and just letting all the practice and all the work that you've put in come out in your execution and just get out of your own way."

McIlroy is making his sixth appearance in the Masters and has been paired with 20-year-old Jordan Spieth and 23-year-old Patrick Reed.

Scotland's Stephen Gallacher will make his Masters debut alongside two players boasting 17 Augusta appearances between them in past Open champion Darren Clarke and American Nick Watney at 4.47pm UK time tomorrow.

Sandy Lyle, the first British winner at Augusta in 1988, will tee-up in a 33rd Masters at 11.25am local time (4.25pm UK) and joined by last week's Shell Houston Open winner, Matt Jones of Australia and American Ken Duke.