It was within the realm of possibilities he had totsuka since the spirit item was synced w Itachi's eyes. But Sasuke would've just sealed all the beasts in the sword if he could
Sasuke doesn't have Totsuka, and it certainly isn't bound by Itachi's eyes. It being bound to his soul or w.e would make more sense, but then again, who am I to say your wrong with no proof?