Johan Bellemans is a Belgian former Olympic sailor and physician who became known for the announcement of "discovery" of the anterolateral ligament, already discovered by French doctor Paul Segond in 1879 . He discovered it along with in 2013, after a 134-year period of study for a missing part. In 2002 he also discovered the reason for limited flexion that is frequently noted after knee replacement surgery, and the concept of posterior condylar offset was originated by him.