Here come the kids again... :-?
Off the top of my head, without any research whatsoever:
Borg vs McEnroe, 1980 Wimbledon final
McEnroe vs Wilander, 1982 Davis Cup QF
Becker vs Lendl, 1988 Masters final
Connors vs Krickstein, 1991 US Open 4R
Becker vs Sampras, 1996 Masters final
Rafter vs...