March 29, 2003: Sassuolo - Prignano (188 km):
1 Luca Mazzanti (Ita) Ceramiche Panaria-Fiordo 04:32:15 (38.44 km/h)
2 Steve Zampieri (Swi) Sidermec            0.04
3 Denis Lunghi (Ita) Alessio                   0.05
4 Hector Orlando Mesa Mesa (Col) Formaggi Pinzolo Fiav?
5 Pavel Tonkov (Rus) CCC-Polsat           0.09
6 Franco Pellizotti (Ita) Alessio                  0.10
7 Francesco Casagrande (Ita) Lampre
8 Serguei Ivanov (Rus) Fassa Bortolo
9 Michele Scarponi (Ita) Domina Vacanze-Elitron
10 Mirko Celestino (Ita) Team Saeco                        0.13
...
17 Marco Pantani (Ita) Mercatone Uno-Scanavino

Overall rankings after stage 4:
1 Mirko Celestino (Ita) Team Saeco  16:52:58 (38.02 km/h)
2 Francesco Casagrande (Ita) Lampre                        0.01
3 Franco Pellizotti (Ita) Alessio                          0.09
4 Alexandr Kolobnev (Rus) Domina Vacanze-Elitron           0.14
5 Yaroslav Popovych (Ukr) Landbouwkrediet-Colnago          0.15
6 Michele Scarponi (Ita) Domina Vacanze-Elitron            0.19
7 Vladimir Miholjevic (Cro) Alessio                        0.25
8 Paolo Tiralongo (Ita) Ceramiche Panaria-Fiordo           0.29
9 Angelo Lopeboselli (Ita) Cofidis-Le Cr?dit par T?l?ph    0.43
10 Raimondas Rumsas (Ltu) Lampre                           0.55
...
12 Marco Pantani (Ita) Mercatone Uno-Scanavino             1.03