Roglič had a 14-second advantage over Thomas which it was impossible to lose on the flat parade around the Italian capital ending in the Colosseum.

The two lives of Roglič were linked together when a former ski jumping teammate pushed him toward the overall title at the Giro.

Mark Cavendish got some help from a former teammate, too, when the British sprinter won Sunday’s final stage with a leadout from Geraint Thomas – less than a week after announcing that he will retire at the end of the season.

In a sport where meticulous planning can only go so far, it was two unexpected circumstances that propelled Roglič and Cavendish atop the podium.

One of the key moments for Roglič came in Saturday’s mountain time trial when he rode over a pothole and his chain popped loose on one of the steepest sections up to Monte Lussari.

After Roglič put the chain back in place by himself and was aided by a Jumbo Visma team staff member, another man wearing a red shirt ran down the mountain and helped push him back into action – and then kept running alongside for encouragement.

Roglič went on to win the penultimate stage and take the pink jersey from Thomas before Sunday’s mostly ceremonious ride over the cobblestoned streets of Rome.

On Sunday, Roglič confirmed that the man in the red shirt was Mitja Meznar who, along with Roglič, was a member of the Slovenian squad that won a gold medal in team ski jumping at the 2007 junior Nordic world championships in Planica, Slovenia, and Tarvisio – the same town where Monte Lussari is located.

The 33-year-old Roglič stopped ski jumping in 2012 and took up cycling and has now won a fourth Grand Tour to go with his three Spanish Vuelta titles.

The first Slovenian to win the Giro, Roglič finished 14 seconds ahead of Thomas and 1 minute, 15 seconds ahead of Joao Almeida in the overall standings.

It’s the smallest finishing gap between the top riders in the Giro since Eddy Merckx won by 12 seconds ahead of Gianbattista Baronchelli in 1974.

Riding a pink bike and wearing a pink helmet and pink socks, Roglic took it easy during the 135-km stage that concluded next to the Roman Forum.

Cavendish claimed the 54th grand tour stage win of his career – and he had Thomas to thank for it.

The pair were together at Team Sky more than a decade ago and have also been teammates for years with Britain at the world championships.

“I kind of said jokingly, ‘Fancy leading out?’” Cavendish said.

“(Thomas) just shouted, ‘Cav,’ and just went. He’s so special. For 25 years he’s been one of my best friends.”

Cavendish’ started his sprint early enough that he was ahead of a crash in the final straight involving several riders.

“Well, if I couldn’t win, I thought I might as well try and help an old mate out,” Thomas tweeted, “Call it an early retirement pressie.”

At age 38 Cavendish became the oldest rider to win a Giro stage, beating the record held by Paolo Tiralongo, who was 37 when he won a stage in 2015.

Alex Kirsch finished second in the stage and Filippo Fiorelli crossed third.

Cavendish will next attempt to break his tie with Eddy Merckx for the most career wins at the Tour de France – 34.

Roglič, however, would not commit to riding the Tour - now the only Grand Tour that he hasn’t won.

AAP