Geraint Thomas will defend his Tour de France title in 2019.
The Cardiff-born rider admits the thrill of lining-up on the start line in Brussels on July 6 with the No 1 on his back was too good an opportunity to turn down.
Thomas has unfinished business with the Giro d’Italia but has opted against trying for the double along with the Vuelta a Espana in 2019.
The Team Sky rider will battle for Yellow Jersey glory with team-mate Chris Froome who has decided not to defend his Giro crown and focus all his energies on a record equalling fifth Tour crown.
Thomas, whose team is still looking for a new sponsor for 2020, also has his eye on the World Time Trial Championships in September in Yorkshire.
He said: “The main goal for me will be to go back to the Tour de France for the best result I can.
“Maybe if I hadn’t have won the Tour in 2018 I might have looked at a Giro / Vuelta programme but, having won the Tour, I’ll have the number one on my back and it would be sad not to go back and not to go back at 100 per cent as well.
“The year will be geared around that, but I’m also looking forward to a slightly different programme as well, and obviously after the Tour, the Worlds in Yorkshire will be massive.
“I think the time trial will be my best chance of getting something out of it. It will be a good goal to have for the end of the year.
“I certainly want to be there because the support in the UK and in Yorkshire especially is just unbelievable at the moment. They’re going to be a massive Worlds and it will be great to be a part of that.”
Froome had to settle for third place last year as Thomas came out on top on the roads of France having won the Giro a few weeks beforehand.
But now he will solely focus on Le Tour for 2020 in what promises to be another epic three weeks battle.
Froome said: “It’s been a hard decision to figure out exactly what to do in 2019 and figure out which Grand Tours to focus on, especially having won the Giro last year and having had such an amazing time out there with the team – but for 2019, my number one objective is going to be the Tour de France.
“It was definitely a difficult decision not to go back to the Giro d’Italia and defend the maglia rosa.
“I’ve got some amazing memories from last year, but I think, with the Tour de France as my main objective, it’s probably better that I skip the Giro d’Italia in 2019.
“I’m getting to the point in my career now where I’m starting to think about what kind of legacy I want to leave behind and if I am able to win the Tour de France for a fifth time and join that very elite group of bike riders – only four other people have ever done that – it would just be incredible.”
Eddy Merckx, Jacques Anquetil, Bernard Hinaut and Miguel Indurain are the only riders to have won five Yellow Jerseys.