The top-of-the-table clash between Fremantle and Sydney is the perfect scenesetter for round 18, with a host of games to challenge AFL tipsters. Peter Ryan tells guest panelist Sam McClure he’s been burnt too many times by North Melbourne, so will be tipping Collingwood to beat them on Friday, while the GWS vs Geelong game and the battle between Cartlon and Hawthorn are pivotal for this year’s finals race and also for many tipping competitions across the country.