Harrington: 'Rory is the only one capable of beating' Johnson

Dustin Johnson is the favorite heading into next week's Masters Tournament and for good reason.

Johnson is the world No. 1 golfer at the moment and has claimed three straight victories, two of them WGC events. Padraig Harrington, a three-time major champion, believes only one player can beat Johnson.

"Rory is the second favorite," Harrington told RTE Game On. "At the end of the day, DJ is playing the golf of his life at the moment, he's peaked, he's really on form. There are a number of great players in the game at the moment, but I get the feeling that they are all looking over their shoulder and looking at other players, worried about other players."

Johnson has finished in the top 10 the last two years and seeks his second major title, while McIlroy needs only the Masters to complete the career grand slam.

"DJ (Johnson) doesn't think very much, I don't think DJ looks over his shoulder," Harrington added. "I don't think he worries at all. DJ is the most likely one to play his game next week, and if he does turn up and perform, he'll be the winner. Rory is the only one capable of beating him at this very moment.”