Rory McIlroy’s preparation for the Masters has divided opinions after his victory at Augusta National.The world No.2 completed a successful defence of his crown by claiming the Green Jacket for a second time on Sunday.McIlroy’s Masters triumph has divided opinions amongst golf fans and punditsGettyMcIlroy clinched a one-shot victory ahead of Scottie Scheffler to win his sixth major championship.The 36-year-old also became only the fourth player to win back-to-back Masters after Jack Nicklaus, Nick Faldo and Tiger Woods.McIlroy had an ‘advantage’However, some fans and pundits have argued McIlroy had an ‘advantage’ over his rivals thanks to his preparation.Following his win, he joked Augusta feels like his ‘home course’ after multiple practice rounds in the lead up to the tournament.Former European Tour player Andrew ‘Chubby’ Chandler believes the amount he played the course gave McIlroy an edge.Speaking on Hawksbee & Jacobs, Chandler was asked if he thought McIlroy had a chance of retaining ahead of the event.He explained: “Yes, there’s no reason for him not to do well.“When you’ve had the monkey on your back for 15 years like he had, it had to be easier coming here with a Green Jacket in your wardrobe.“I think if he’d have won in 2011, he might well have won ten Green Jackets by now.”Chandler continued: “(I’m) not sure who didn’t fancy his chances because he hadn’t played. I mean he had a bad back for a couple of weeks but golfers have bad backs when they want bad backs.McIlroy’s former manager Chandler believes his Augusta practice rounds gave him an ‘advantage’Getty Images - Getty“I don’t quite know how injured he was but there’s no doubt he was.“When you’ve got somebody like Rory playing the same course three weeks before the tournament, he’s going to have a bit of an advantage.”McIlroy Masters theory ‘dumbest ever’The theory has been rubbished by Kevin Kisner, though, as the four-time PGA Tour winner gave his stance on McIlroy’s win.Kisner was asked about the access players have to Augusta ahead of the Masters during an appearance on the Fore Play podcast.The American has played at the event eight times during his professional career.He revealed: “Well, as soon as you get your invitation you’re a welcome guest. Obviously, you just have to call and set it up with the pro shop.Kisner has labelled the McIlroy theory the ‘dumbest argument’ he has ever heardGetty“I’ve heard that they’ve told you how many times you can come. Like if somebody is coming every week, every day, they’re like ‘alright, bud, you’ve been here 15 times. That’s enough for this leading up to it.’“I can guarantee you they’re not going to tell a defending champion, ‘hey, you can’t bring your G650 up here on Tuesday morning and leave Tuesday afternoon every day this week.’“I don’t think it really matters. And when Rory’s mentioning that, I don’t think he means like he’s been up there 20 times in the last three weeks.“I think he means like, ‘I came up here four times leading up,’ and one of the days I played over there, he was there. He literally just played 18 holes and had lunch.“He did do exactly what he said and who cares how many times he went? Everybody else can go just as much as they want, they just can’t beat him.“I would look at Rory this week with a B- to a B+ game and still won the Masters.McIlroy won his sixth major and second Masters title at Augusta on SundayShutterstock Editorial“That whole thing, to your point, I don’t think it matters at all. I thought it was the dumbest argument I’d ever seen in my life. People just don’t understand.“I probably played (at Augusta) like 10 times a year leading up to the Masters.”Having added a second Masters triumph to his list of titles, McIlroy could now complete another career Grand Slam this year.Wins at the US Open and The Open would see him win all four majors twice in his career.His first chance to add to his tally will come at Shinnecock Hills with the US Open taking place across June 18 to 21.The 154th Open will then be held at Royal Birkdale between July 16 and 19 as the final major of the year.