What happens when you put a pair of Olympic champions side-by-side in training?
Just ask Craig Jackson -- coach of Melbourne Vicentre Swimming Club in Australia.
Jackson's star pupil Mack Horton -- 2016 Olympic gold medalist in the 400m free -- was recently joined by Italian distance star Gregorio Paltrinieri -- 2016 Olympic gold medalist in the 1500m free.
In the interview above, Jackson shares his insights on how the two compliment one another in training sessions.
Video reporting by Bobby Hurley