Monte Zoncolan - Nairo Quintana of Colombia is certain of Giro d'Italia victory barring any final stage disaster after preserving his handsome lead in Saturday's penultimate 20th stage won by Australia's Michael Rogers.
Quintana came home in a pack ahead of his closest rival Rigoberto Uran and carries a 3min 7sec lead into Sunday's closing 172km flat run.
The Movistar rider, who measures just 1.67m (5ft 6in) and finished second in last year's Tour de France, is set for his first major Tour victory as the race which began in Belfast, Northern Ireland three weeks ago, concludes in Trieste.
For Rogers this was his second win after coming home first in the 11th stage which finished at Savone.
"Bjarne Risse (team manager) told us to get two in the escape and I was the last one to get in. Nicolas (teammate Roche) really worked hard for me and I could concentrate on the Zoncolan, a climb I didn't know," said Rogers.
"We had very little information on the time gaps but at the end I delivered a time-trial performance on the climb.
"Every victory is beautiful but the Zoncolan, is a mountain historic on the Giro. For any rider, it's a dream to win this stage," he added.
Rogers came out on top at the summit finish, outlasting Italian Franco Pellizotti by 38secs after the two men broke away from an early escape group.
"I wanted to win but victory wasn't smiling on me," said a dejected Pellizotti.
"If I had done it, it would have been the greatest day of my career. There were so many fans who came out to support me. Such a shame." he added.
Another Italian Francesco Bongiorno, who was badly hindered by an over excited supporter, took third place, 49secs adrift of Rogers with Irishman Nicolas Roche in fourth at 1min 35secs.
"I am very bitter about what happened," said Bongiorno. "I couldn't play my card the way I wanted because of this push from the supporter and I had to put my foot down which made me lose my rhythm.
"On a climb like this, it's very difficult to recover and I cried with anger, but what could I do.
"It should be a warning, perhaps alcohol was too high as well. The supporters are there to help but they have to show respect," added the Bardiani rider.
Quintana and Uran crossed the line together at 4min 45secs but it had no major effect on the overall standings.
Organisers had promoted the 167km run from Maniago to Monte Zoncolan as one of the toughest in Europe with a final 10km run facing the riders with a climb of 11.9 per cent.
After a long breakaway group reached the base of the final climb with a lead of seven minutes on the peloton, Rogers and Bongiorno made their move 5km from home with the Australian making his final attack at 3km from the finish following the fan incident with the Italian.
The 34-year-old Rogers only returned to
competition in April at the Liege-Bastogne-Liege following a positive
doping test last season that was eventually dismissed.
STAGE 20 RESULTS
2. Franco Pellizotti (Italy / Androni Giocattoli) +37"
3. Francesco Bongiorno (Italy / Bardiani Valvole) +48"
4. Nicolas Roche (Ireland / Tinkoff - Saxo) +1:34"
5. Brent Bookwalter (U.S. / BMC Racing) +1:36"
6. Robinson Chalapud (Colombia / Colombia) +1:46"
7. Georg Preidler (Austria / Giant) +1:54"
8. Maxime Monfort (Belgium / Lotto) +2:13"
9. Dario Cataldo (Italy / Team Sky) +2:23"
10. Simon Geschke (Germany / Giant) +2:38"
11. Mattia Cattaneo (Italy / Lampre)
12. Yonathan Monsalve (Venezuela / Neri Sottoli) +3:01"
1. Nairo Quintana (Colombia / Movistar) 83:50:25"
2. Rigoberto Uran (Colombia / Omega Pharma - Quick-Step) +3:07"
3. Fabio Aru (Italy / Astana) +4:04"
4. Pierre Rolland (France / Europcar) +5:46"
5. Domenico Pozzovivo (Italy / AG2R) +6:41"
6. Rafal Majka (Poland / Tinkoff - Saxo) +7:13"
7. Wilco Kelderman (Netherlands / Belkin) +11:09"
8. Cadel Evans (Australia / BMC Racing) +12:00"
9. Ryder Hesjedal (Canada / Garmin) +13:35"
10. Robert Kiserlovski (Croatia / Trek) +15:49"