Why did Leonardo and Michelangelo dislike each other?

Michelangelo was a sculptor and he was a great fan of Leo's work, Leo was more successful and had trained for years in anatomy science sculpting, architecture blah blah blah and had retired in France as a painter and a writer, Michelangelo had just spent his life into sculpting and charcoal art (and Leonardo did not dislike Michelangelo, he just thought he was a good match to his art so Michelangelo became a spectator of Leo because his jealousy overcome him)