Maurizio Sarri is delighted with "extraordinary" Cristiano Ronaldo and with Juventus' form, but acknowledges the team must be better than in seasons past if they are to again retain their Serie A title.
The Bianconeri defeated Roma 3-1 in the Coppa Italia quarter-finals on Wednesday, scoring through Ronaldo, Rodrigo Bentancur and Leonardo Bonucci before half-time.
It was a fifth win in a row in all competitions for Juve, in which time they have built a four-point lead over Inter at the top of the league table.
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Sarri saw evidence of this winning mentality against Roma but acknowledged improvement was required in a three-way title tussle with the Nerazzurri and Lazio.