Input (grade 13): There were also events for wheelchair tennis players, they competed in two categories: Paraplegic players where men and women play in separate competitions and a category for Quadriplegic's, shortened to Quads and is a mixed event. These competitions are part of the NEC tour, under the Grand Slam category.
Output (grade 12): There was also events for wheelchair tennis players (they competed in three categories: men, women and quadipedic) as part of the NEC tour, under the Grand Slam group.