Preliminary
Zetsu ( +200 fodder white Zetsu)
Sakura wins low-diff. Its watch them coming and hit em up.
Round 1
Konan
Sakura wins, mid-diff. Origami girl can't stay untouchable forever and both Katsuyu's acid and a chakra scalpel should be able to destroy her paper.
Round 2
Hidan
Sakura wins, mid-diff. His jutsu is useless on her and considering her recent strenght feat, i don't find the possibility of her punching his head off nonsense at all.
Round 3
Kisame (w/o Samehada)
Kisame wins, mid-diff. She waits for her to drown then drains her chakra.
Round 4
Orochimaru (Armless)
Restrictions: Eight Branches
Sakura wins mid-high diff (similar stuff done in canon with Tsunade).
Round 5
Sasori
Sakura wins, mid-high diff. Imo Byakugo can be used to delay the poison's effects. Also, if we consider only the knowledge she's got in canon, i can see her taking this with her strenght, evasion and Katsuyu. This is another alternative.
Round 6
Deidara
Restrictions: C4 / C3
Sakura wins, high-diff.
She can't really do anything while getting nuked and her opponent is a flying type, but w/o C4 Deidara can't kill her. He would be fighting an inevitably lost fight.
Round 7
Kakuzu
Sakura wins, mid-high diff. He can't kill her, but she can destroy anything he has. Simple as that.
Round 8
Itachi
Restrictions: Spiritual Weapons (Yata / Totsuka)
Itachi wins, mid-diff. No explanations needed.
Round 9
Deva Pein
Restrictions: Chibaku, Large-scale S/T (Konoha wiper)
Sakura wins, mid-diff. Base Naruto handled this guy, nuff said.
Semi-Final Round
Nagato (Nagato is crippled)
Restrictions: Chibaku, Large-scale S/T, Summoning: Multiplying Dog, Gedo Statue
Nagato wins, low-diff. Same as Itachi.
Final Round
Obito
Restrictions: Gedo Statue
Obito wins, troll-diff. ( ͡° ͜ʖ ͡°)