Published Monday, 22 July 2013
McIlroy and Mickelson pictured during the second round at the Open on Friday. (© Getty)
The American carded a final round of 66 at Muirfield in Scotland at the weekend to win the Claret Jug for the first time in his career, bringing him to five major titles.
He has moved from fifth to second in the world rankings.
McIlroy has now moved to third after he missed the cut at the second round on Friday.
The 24-year-old from Holywood won five titles last year to finish top of the money list on both sides of the Atlantic.
He has yet to record a win this year.
Offering advice on Monday, Ryder Cup team-mate Ian Poulter said: "Stop reading the newspapers, stop listening to other people, go out there and do your stuff.
"There is a reason he was sought after by a new manufacturer and why they pay the big bucks because he is that good. He's just going to have to settle into the equipment, settle into himself being in a different environment now."
He told Sky Sports News: "You don't win two majors by the age of 23 and disappear. Rory is here for a long time and he is going to be back at the top very soon."
© UTV News