No key Raptor has more to prove than DeMar DeRozan this season.

Jonas Valanciunas and Terrence Ross are rookies, Andrea Bargnani had a semi-breakout campaign last year.

Meanwhile, DeRozan struggled, shooting a career-worst 42.2% from the field, including a huge decline in his mid-range marksmanship. He was particularly poor in the first half of the season. Coupled with the fact his defence didn't take a noticeable step forward, unlike many of his teammates, means 2012-13 is shaping up as a huge year for the fourth-year guard, who is eligible for a contract extension until Halloween.