Sergio Henao battled to a fourth place finish as Fleche Wallonne was decided in a showdown on the famous Mur de Huy.
After the stage Kwiatkowski reflected on the race and its famous final climb. He said: "Mur de Huy really makes us sweat and there was no mercy this time. We failed to beat Alejandro, but together with Sergio we can be proud of our team, especially in the last difficult kilometres.
"We were there until the final cut and this is what matters before La Doyenne (Liege-Bastogne-Liege). Thanks for the great support along the course."
1. Alejandro Valverde (Movistar) 5:15:37
2. Dan Martin (Quick-Step Floors) +1"
3. Dylan Teuns (BMC Racing) s.t.
4. Sergio Henao (Team Sky)
5. Michael Albasini (Orica-Scott)
7. Michal Kwiatkowski (Team Sky)