Coco Gauff, notwithstanding an earlier *faux pas* of preternatural levity—forgetting her *sine qua non*, her rackets—nonetheless cemented her Roland-Garros quarterfinal berth with a straight-sets triumph, an event occasioning a piquant *échange* with compatriot Frances Tiafoe (himself no stranger to such absentmindedness, and also a quarterfinalist), who quipped "Mrs. Mature," a jibe Gauff parried, albeit weakly, citing the precocious maturity demanded by the professional tennis crucible, before girding herself to face Madison Keys in an all-American quarterfinal *bellum* on Wednesday, a situation further underscored by the persistent perception of Gauff as a mature player, borne of her early Wimbledon breakthrough at 15 and subsequent Grand Slam apotheosis at 19.