Even Monaco coach Leonardo Jardim rates it as only a one in 20 shot.
Trezeguet also paid tribute to Monaco, another of his former clubs, ahead of Tuesday's second leg in Turin.
If there is one thing which gives Jardim hope, it is Monaco's prolific scoring record this season.
However, Monaco will take heart from the fact that only five of the 12 sides since 2012/13 with a two goal lead from the first away leg have won the return, though all of them did manage to progress.
AS Monaco have a mountain to climb against the mighty Juventus
Last week's match was billed in some quarters as a battle between Europe's finest attack and the continent's most obdurate defence - and it was obvious who came out on top.
Against that backdrop, Jardim said his primary task has been to instil a belief in his squad that they are not contesting a dead rubber. Monaco have just one player on a booking, defensive midfielder Fabinho. Expect Juventus to start with the same line up as they did in their away match. "The difference was their success rate was 100 per cent, ours was zero".
"You never know what can happen in a match". So far they played 11 matches, of which 8 were won and 3 ended in a draw. We have proved that we can score plenty of goals this season so we still believe we can do it, we still have a chance.
It's always risky backing a team to win when they don't actually need to win, however, so there's little appeal in supporting the Serie A champions.More news: Conservatives make huge gains in United Kingdom local elections
The visitors will be hoping that marauding left back Benjamin Mendy, who missed the first leg as well as Monaco's 0-3 victory at AS Nancy at the weekend, will make the squad, with the situation over his injury now unclear.
"When you see someone like (Croatian forward Mario) Mandzukic, with all the medals he has, working like he did on the left of midfield".
Juve, who are on the verge of a sixth straight title, reached the final in Berlin two years ago only to lose out to Barcelona. "If we score early and some decisions go our way".
Dani Alves has scored more goals (9) and delivered more assists (25) than any other full-back in the Champions League since his debut in 2007/08. For all the experience of Radamel Falcao and the youthful talent of Kylian Mbappe, it could be another fruitless night for the Monaco attack.More news: Celebrating Cinco de Mayo in Pillette Village
It's going to be tough for Monaco, many of whose young players are featuring at this stage of the competition for the first time in their careers.
But Higuain's ability to conjure goals from the slimmest of opportunities means Monaco can not throw caution to the wind.
We'll be making highlights of the game available for FREE shortly after the final whistle on BTSport.com and on the BT Sport app.
No team has ever reversed a two-goal loss in the Champions League semifinals.More news: Braden Holtby will start Game 3 for Capitals against Penguins
The only injury doubt on either side concerns Monaco defender Benjamin Mendy, after holding midfielder Tiemoue Bakayoko was declared fit.
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