my flush draw rivered me top pair. should i call the river?

[SackUp]

I'd have a hard time not calling this pot HU expecting to see a Qx hand a fair amount of the time.

Consider his range from UTG+1. There are not that many hands that he has which are beating you. I would limit to A8, 44, 88 and maybe K8. I would take out AQ and QQ b/c he should be raising those.

The hands we beat are likely KQo, QJ, Q10, and maybe Q9 and the occasional bluff hand with a PP.