Ok,
I forgot about Muster in '95. 35 match winning streak(all on clay) Estoril, Barcelona, Monte Carlo, Rome,Roland Garros, St. Polten until he lost to Corretja in Gstaad. Guy was an animal.
Andre's tops was 26 in '95(great year for win streaks, huh?)
Pete's was 29 in '94, though his loss in match #30 to Stich at the World Team Cup was kinda cheesy. I don't know why the ATP counts that as a tour event.
Fed is at 11 right now, he was at 16 before Henman beat him in Rotterdam.