His matchups with a rookie Rose were in Rose's favor.
I'm just going to start with this one, because it's so easy to refute:
2009 Playoffs !st round:
Rajon Rondo
19.4 PPG, 9.3 RPG, 11.6 APG, 2.1 TOPG, 2.7 SPG, .454 FG%
4/9 3s, 24/37 FTs
Derrick Rose:
19.7 PPG, 6.3 RPG, 6.4 APG, 5.0 TOPG, 0.6 SPG, .492 FG%
0/4 3s, 20/25 FTs
Celtics in 7.
I don't see any way that you can claim that the matchup was in Rose's favor. Rondo, hands down.