Sentence:  Spin is a major feature of real tennis – because of it, some of the slowest shots can be the hardest to return. [...] Strokes played into the "<WSD>nick</WSD>" (the corner of the floor and the wall) and aggressive drives into the dedans, the winning gallery, or the grille are unreturnable. 
Meaning of the word marked with <WSD> tags:  The point where the wall of the court meets the floor.