DELRAY BEACH, Fla. — Before this week, if you’re a casual tennis fan, you probably knew Frances Tiafoe in one of three ways. Winner of the 2013 Orange Bowl, Tiafoe—the son of immigrants from Sierra Leone—has been regarded as one of the most promising young Americans on tour since he turned pro in 2015, when he was just 17. He also took Roger Federer to five sets in the opening round of the 2017 U.S. Open, narrowly falling short in a close fifth set. And there was also that time when Tiafoe’s Challenger Tour match was interrupted by, well—let’s just say it was NSFW.