The last one-handed left-handed slam winners were Petr Korda winning the Australian in 1998 and Muster winning the French in 1995. Interesting that there are so few lefty one-handers winning slams since McEnroe. Would they have the same problems with righty-forehand to lefty-backhand as Federer does with Nadal? That wouldn't matter as much with serve-and-volleyers. In those days being a lefty was considered an advantage (esp. on the serve to set up the volley). Is it a disadvantage now with baseline play predominating?