Was a close and competitive fight, could have gone either way. What I took from that fight is that Lovato is indeed legit, he was able to do with Mousasi what top UFC fighters like Weidman struggled with.
I do think Mousasi could beat Whittaker but would struggle a lot more with someone like Yoel Romero, styles make fights and all that.
The talent at middleweight right now is so closely matched, it'd be foolish to doubt someone as good as Mousasi could be the number one guy on a given night, even after last nights loss.