Ah perdona, primo affetto - arranged for soprano and tenor

I've been listening to Mozart's La Clemenza di Tito a lot lately, and it really is one of his most underrated works. There are many beautiful numbers, especially this duet between Servilia and Annio. Apparently, Mozart set Annio, a guy, as a soprano woman performing "en travesti."
What I did in this arrangement is that I changed Annio into a tenor, rewrote some of his lines, and changed some of the orchestration near the end. I'd like to know from any tenors if the high A in the middle of the duet is too difficult to sing.
Seriously, have a listen to La Clemenza.