(Reuters) - Golf fans can expect a week to savor at the Memorial tournament in Dublin, Ohio, where the game's Big Three' of Jason Day, Jordan Spieth and Rory McIlroy will each be bringing winning form to the leafy Muirfield Village layout. World number one Day clinched his third PGA Tour victory of the season at the Players Championship last month, second-ranked Spieth triumphed at the Colonial tournament on Sunday and third-ranked McIlroy won the European Tour's Irish Open 10 days ago. The heavyweight trio heads a typically powerful field in the prestigious event hosted by Jack Nicklaus, where seven of the world's top 10 will be competing this week, but McIlroy is wary of too much emphasis being placed on the so-called 'Big Three'. More...