Vuelta a Burgos - Stage five: Santo Domingo de Silos › Lagunas de Neila, 146 km.
Demonstrating his maturity, Sosa did not panic and was paced back to the two escapees by David de la Cruz, who sacrificed his own GC hopes, and then Kenny Elissonde to bring the race back together ahead of the final kilometre.
Rui Costa, who was no threat to the overall picture, was allowed to break free for a short period until Sosa attacked from the GC group, caught and then surpassed Costa to round off a superb team performance.
I'm so happy with the team, happy that they believed in me, as this is such a big result for me. I'm very excited about this win."
"In the final kilometres, the team helped me to so much, they went full gas and it was fantastic. As we were approaching the final kilometre, I was a bit on the limit, so I tried to accelerate and bridge to Rui Costa as he looked strong. And then I was able to attack again.
"I'm so happy with the team, happy that they believed in me, as this is such a big result for me. I'm very excited about this win."
1. Ivan Sosa (Team INEOS) 18:53:44
2. Oscar Rodriguez (Euskadi) +31"
3. Richard Carapaz (Movistar) +42"
4. Antonio Pedrero (Movistar) +46"
5. Guillame Martin (Wanty-Gobert Cycling Team) +1'13"