The low top version was the one McEnroe wore, only after seeing it by accident. In the same Sneaker Freaker feature on the Nike Training line, John Barbour, who worked on the early trainer models with Tinker Hatfield, Nike’s most legendary designer, recounted a story that involved Nike reps showing some tennis-geared models to McEnroe. The hotheaded tennis star saw the Air Trainer 1 in the bag and was intrigued by its innovative design. The rep attempted to push the tennis-specific models, but McEnroe chose the Air Trainer 1. His endorsement of the Trainer as a Tennis shoe caused Nike to realize that they could broaden the perspective of what their court models could look like. 13 years after the first Air Trainer, Nike crafted the Air McEnroe Trainer featuring an inner tongue tag that said “Mac Knows,” a flip on the classic “Bo Knows” campaign for Bo Jackson.