Geraint Thomas has signed a two-year contract extension to remain with Team Sky until 2018.
The Welshman has contributed much to their success since they were established in 2010 and is again expected to be influential in the team's pursuit of a fourth Tour de France in July.
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It is believed the new contract commits him to one year with the option of a further 12 months.
Thomas posted on his Facebook page on Monday: " Good morning! Super happy to announce that I've extended my contract with Team Sky for another two years.
"Thank you for all your loyal support and kind words. It has really helped me to get to where I am today - hopefully I can continue to improve as a cyclist and grow with the team. Looking forward to what the future holds and here's to bigger and better things ahead!"
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The 29-year-old, who earlier this season became the third Briton behind Tom Simpson and Bradley Wiggins to win the Paris-Nice race, continued in a Team Sky statement: "Signing again was an easy decision.
"I've only really just started when it comes to trying to win stage races. I'm learning all the time about how to get in the best shape for them and how to lead a team.
"For me, this year started with winning Paris-Nice and is now about going to the Tour in the best shape possible to support Froomey (Chris Froome). After the Tour we can start looking to next year and keep setting bigger and better goals.
"It's about keeping that progression going, and Team Sky is the best place to do that. I'm just super happy being part of the team."
Thomas also won this year's Volta ao Algarve, team pursuit gold at the past two Olympics and in 2015 finished a career-best 15th in the Tour de France.
Team Sky principal Sir Dave Brailsford added: "Geraint is one of the most versatile bike racers in the world. He has demonstrated this by winning on the track, in the Classics and now in stage races.
"He has gone from strength to strength and winning Paris-Nice this year was another step up. It gave him real confidence and now he can set his sights on developing his performances in the Grand Tours.
"I still believe the best is yet to come from Geraint and we will enjoy supporting him to see just how far he can go."
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