Colombian José Serpa (Diquigiovanni) kicked in the afterburners in the final kilometer to win the mountain top finish at La Carolina in Argentina. Leading the dwindling field across the finish 6 seconds later were Matti Breschel (Saxo Bank) and winner of the first stage Mattias Gavazzi (Diquigiovanni). Part of the same group of twenty-eight riders were GC leader Alfredo Lucero (Argentina B), the Colavita-Sutter Home duo of Lucas Sebastian Haedo and Luis Amaran and the Bissell trio of Tom Zirbel, Ben and Andy Jacques-Maynes. Ivan Basso (Liquigas) finished a further 11 seconds back.
No major changes in the general classification. Argentinean Lucero is still in the lead ahead of Jorge Giacinti (Argentina-A) and L. Haedo. The win propelled Serpa up one spot to fourth place. Zirbel and B. Jacques-Maynes each moved up one spot to sixth and seventh place respectively leapfrogging over Basso.
L. Haedo successfully defended his jersey by taking the first sprint point ahead of second placed B. Jaques-Maynes. But he did lose the lead in the mountain jersey which will now by worn by Nazaret Prado (Brasil) who won the first KOM of the day.
Tomorrow is the Queen Stage. At 127-mile (204.8 km), stage 5 is the longest stage of the race which includes a tough Cat 2 climb at the 55 mile (88 km) mark and finishes up with a 13 mile (21.8 km) climb to the top of Mirador del Sol at 3937 feet (1200 m) above sea level.
1. José Serpa (Diquigiovanni) 3:57:53
2. Matti Breschel (Saxo Bank) +0:06
3. Mattias Gavazzi (Diquigiovanni) st
1. Alfredo Lucero (Argentina A) 12:40:39
2. Jorge Giacinti (Argentina A) 01:36
3. Lucas Sebastian Haedo (Colavita-Sutter Home) 01:49
4. José Serpa (Diquigiovanni) 02:03
5. Andrey Grivko (ISD) 02:12
6. Tom Zirbel (Bissell) 02:33
7. Ben Jacques-Maynes (Bissell) 02:37
8. Ivan Basso (Liquigas) 02:40
10. Luis Amaran (Colavita-Sutter Home) 03:04
1. Nazaret Prado (Brasil) 13 points
2. Lucas Haedo (Colavita-Sutter Home) 11
3. Alfredo Lucero (Argentina B) 9
1. Lucas Haedo (Colavita-Sutter Home) 11 points
2. Ben Jacques-Maynes (Bissell) (Bissell) 7
3. Josué Moyano (Argentina Sub 23) 5