sakura prolly could do it one day, 2nd tunade prolly can do it right now but the rasengan isnt a jutsu based on chakra control but on actual shape manipulation, that jutsu takes shape maniplulation to the highest known state done in 3 stages to accomplish the just the 1st level of the rasengan.my point is that both sakura and tunade are prolly capable of the chakra control part but the jutsu is based on the shape manipulation of chakra so... that being said i dont think thy can do it
"I hand out pockets full of ass whoopin to the poor" -Emperor Yatar
hmm i wonder what obitos doing right now.... decomposing and smelling up the joint i gess coz hes dead!!
Sakura is only good for fellatio no jutsu...
perhaps a sandwich no jutsu as well