Carlton take on the reigning premiers who are riding a seven-game winning streak, and our tipsters expect the the Blues to come out breathing fire for captain Patrick Cripps' 250th match. But is that emotion enough to tip the Blues? It's moving round, and there are plenty of 50-50 clashes at play in round 21. The battle of Charlie Curnow against former teammate Jack Silvagni takes centre stage, as does Christian Petracca's first match against the Demons. Plus, the "stinker" that's a toss of the coin.