She’s 46, an age at which appearances in professional sport at the highestlevel are pooh-poohed upon. He’s going on 30, past his prime and slowly, butsurely, seeing his craft slip into a gentle decline. With her 57 Grand Slamtitles, she’s the second-most decorated woman in the history of tennis afterAustralian Margaret Court. He, at best, can be described as a comet that flashedbriefly across the tennis skies, a competent doubles player who’s had his dayout and has five Slams to show for it.