Nairo Quintana has won the Volta a Catalunya ahead of Alberto Contador, Daniel Martin, with Australia's Richie Porte finishing fourth.
Quintana (Movistar) successfully defended his seven-second advantage over Contador (Tinkoff) on the final stage, an eight-lap course covering 136.4 kilometres in and around Barcelona.
Katusha's Aleksei Tsatevich won the stage in a sprint with Primoz Roglic (LottoNL-Jumbo) and Jarlinson Pantano of IAM Cycling following.
Quintana stayed close to Contador from the start and his lead was never in jeopardy - finishing with the same seven-second gap he carried into the closing stage, becoming the third Colombian to win the race after Hernan Buenahora in 1998 and Alvaro Mejia in 1993.
Dan Martin (Etixx-QuickStep), the 2013 winner, finished third overall at 17 seconds behind Quintana. Defending champion Porte was fourth.
"I'm very, very happy. I have started the year well. This is really an incredible win, one of the hardest fought I've had in my career. Thanks to the team for their phenomenal work. We suffered for this and today we have been rewarded,” Quintana said.
"We started the day with more strength than legs. Three of our riders were ill, with José Herrada and Marc Soler down with flu, so we had to defend my race lead with five. It was as hard-fought a stage as I have ever ridden. I have won the Volta by just seven seconds, which isn't a big margin and shows that my rivals were strong.
"I wouldn't say I'm getting ahead of myself. There are still many races to go, and we start them from zero, but having beaten all the big names who were here gives me confidence that I am doing things well with the focus on my dream of winning the yellow jersey. Winning here in Catalunya also means that I am still growing, still maturing, and progressing towards the big goal that we have set this season. I will keep accumulating race days and hopefully reach the start of the Tour de France in good shape. I'll be in the Basque Country, then at Liège and Romandie.
"This win is dedicated to my team-mates Adriano Malori and Jonathan Castroviejo, wishing them both a full and speedy recovery. It is also for the fans, especially the Colombians. A few years ago it was a surprise for me to see them here: now it feels normal, but it is still great to see them, not just here, in France too, and all over Europe. They are wonderful people."
The week long event in northeastern Spain attracted some of cycling’s top riders, including Tour de France champion Chris Froome, who finished eighth overall, 46 seconds behind Quintana.