Board Thread:Theories and Speculation/@comment-36019309-20190114073523/@comment-36019309-20190114190955

Thekillman wrote: MadEyes008 wrote: If Itachi’s Tsukuyomi succeeded than it would have ruined everything and the only way he could make sure Sasuke wouldn’t lose is by holding back. This is why Itachi used it several times on Sasuke, so he could get used to it and break out. It's made fairly clear that Sasuke is capable of breaking out, Itachi, Zetsu and the databooks point to this.

Itachi was holding back by not going for every obvious opening to murder his brother. The very opening of the fight has Itachi resoundly win the Genjutsu battle. Yet he doesn't move and just sits and gloats. But the jutsu he used were full strength. Itachi nearly breaks his cover by failing to dodge the Shuriken, indicating he was fully serious. Itachi said he only someone with a sharingan and kekkai genkai could stop him, not that Sasuke was capable of breaking tsukuyomi, when Itachi's completely serious. Zetsu didn't know Itachi was throwing the fight, he was speculating why Sasuke won, without knowing that fact.

The databook only say Sasuke defeated the MS and you can defeat your opponent even if their going easy on you or even if the he concedes.