Which sparring partners have gone on to beat their mentors?

[GhostofDempsey]

After seeing the difficulty Loma had getting past his former sparring partner last night, it sparked the question--which fighters who were sparring partners for A-list fighters and champions went on to beat those fighters? Holmes/Ali was first to come to mind where a former sparring partner beats his mentor, but Ali was well past his prime and at the end of his career. Which sparring partners defeated their mentors while still in their prime?

[QueensburyRules]

- - Did Camacho ever spar Ray?

Both Blubber and AJ beat Wlad, most notably AJ knocked him out in a Fight of the Year performance whilst Blubber emanated eau de moufette.