If these five things happen (or most of them, at least), the Bucks may just beat the Raptors.
1. Giannis asserts himself as the best player in the series.
You could make the case that the team with the best player (meaning the player who performed the best in that particular series) won 13 of the 15 playoff series last season. Something similar happens during many postseasons. Spurs (Leonard) over Grizzlies (Stephenson) Thunder (Durant) over Spurs (Aldridge) Warriors (Curry) over Thunder (Durant) Cavaliers (James) over Warriors (Green) Coincidentally, the Raptors were both of the exceptions last year.
Blazers (Lillard) over Clippers (Jordan)
Thunder (Westbrook) over Mavericks (Nowitzki)
Warriors (Thompson) over Rockets (Harden)
*Raptors (Valanciunas) over Pacers (George)
Heat (Wade) over Hornets (Walker)
Cavaliers (James) over Pistons (Drummond)
Hawks (Millsap) over Celtics (Thomas)
Warriors (Curry) over Blazers (Lillard)
*Raptors (Lowry) over Heat (Wade)
Cavaliers (James) over Hawks (Millsap)
Cavaliers (James) over Raptors (DeRozan)