The 154th Open Championship is here, and we're breaking down the best betting value ahead of Royal Birkdale.Who wins the Claret Jug? We run through our favourite picks, value bets, roughies, best Aussie chances, and our best Top 20 selection for golf's final major of the year.Our picks include:Matt FitzpatrickTommy FleetwoodChris GotterupWyndham ClarkJon RahmTyrrell HattonPatrick ReedBen GriffinTom KimBest Aussie predictionWho are you backing this week? Let us know in the comments.