It was a return six years in the making, and it was a return that perfectly encapsulated Rory McIlroy. Making the trek back to Royal Portrush for The Open Championship -- now as a career grand slam winner -- the Northern Irishman experienced a topsy-turvy day as the hard stuff came easy and the easy stuff came hard.

Will one of the world's top golfers win The Open Championship or will a long shot come from behind to capture the weekend? Here are the odds.

McIlroy, playing with Justin Thomas and Tommy Fleetwood, is one of the early starters in Friday’s second round and sits just three shots behind the leaders overnight, with world No 1 Scottie Scheffler,