Lionel Messi scored twice in Barcelona’s 3-0 win over Liverpool on Wednesday to reignite fan debate comparing the Argentine and Cristiano Ronaldo.
Although most fans lean toward Messi as being the greatest player of all-time, Allegri refused to answer the question outright.
He said: “Ronaldo-Messi? For Cristiano, Messi is a great stimulus.
“Messi has achieved it all, but we have the derby [against Torino on Saturday to think about].
“He [Ronaldo] will want to go ahead in the scoring and he aims to win the top scorer.”
The Portugal captain has scored 27 goals in 40 appearances since joining Juventus from Real Madrid in the summer, with 20 of those goals coming in the league.
Messi on the other hand has scored 48 goals in 46 games in all competitions, with 34 in 32 in the league.
Ronaldo scored six Champions League goals for Juventus before being knocked out by Ajax in the quarter-finals, whereas Messi still has the opportunity to add to his 12 European goals so far this term.
Messi’s sumptuous free-kick sealed a 3-0 lead over Liverpool after the first leg, however, the 31-year-old believes the tie is far from over.
He said: ”The goal from the free kick? It was spectacular, but I was lucky to have found the corner.
“We could have also made the fourth goal, but we must be satisfied.
“However, it is not over yet: the return race is waiting for us. Liverpool is a team with so much physicality and in some situations, we have made a bit of effort.”
In one negative for the Catalan giants, Messi was forced to ask home fans to stop whistling his underperforming team-mate Philippe Coutinho.
Messi told Movistar Plus: “We are in a defining moment and it is not time to criticise anyone.
“It is time to make everything happen as we talked at the beginning of the season. It is ugly to see a team-mate get booed like that.
“We must all be together and support [Coutinho].”