Vlahovic has been struggling with a groin injury as Juve prepare to resume the Serie A season against Cremonese next Wednesday following a break for the World Cup.
The Serbia international scored in his only World Cup start in Qatar, finding the back of the net in a 3-2 defeat to Switzerland.
Vlahovic is the Bianconeri's leading scorer this season with seven goals and head coach Allegri is not concerned over his injury issues.
He said after a 1-1 friendly draw with Standard Liege on Friday: "No. I'm never worried, think what philosophy of life I have. I see all things as an opportunity.
"If we had had [Paul] Pogba and all the great players we have, perhaps [Fabio] Miretti, [Nicolo] Fagioli would not have played.
"They are all good to say: 'Don't let young players play'. Young players, unless they are extraordinary players, play if certain situations arise."
Pogba is working his way back to full fitness after missing the World Cup due to a knee injury.
The 29-year-old is waiting on his first appearance of the season after rejoining the Turin giants following his Manchester United exit.
Allegri said of the France midfielder: "Pogba has been running for four to five days, he's been doing work and his knee is responding well.
"Then there's [Mattia] De Sciglio who's working, [Juan] Cuadrado ran and his knee doesn't bother him, [Leonardo] Bonucci's inflammation is slowly improving. We need to be confident and concentrate on what we have."
Allegri was also able to provide an encouraging update on Federico Chiesa's fitness, too.
"Today he had personalised and therefore differentiated work planned, yesterday he was part of the team and I saw him very well, even too much and I stopped him," he said of the Italy forward.
After a successful season at Bologna, Motta replaced Massimiliano Allegri at Juve and is preparing to put his stamp on the club ahead of the upcoming Serie A campaign.
In an attempt to update the squad, the Italian has targeted a list of players he expects to depart before the end of the transfer window.
Chiesa, who joined Juventus from Fiorentina in October 2020, is one of those on the list after failing to put pen to paper on a contract extension offered to him at the end of last season.
Motta had hinted in the past that the 26-year-old could be on his way out of Turin, but after leaving him out for a pre-season friendly against Brest, he has now confirmed that Chiesa is not part of his plans.
"Chiesa and all the other players not called up for the game are not part of the project," Motta said.
"We have been clear with them; they have to find a new solution and new club as soon as possible. The decision has been made."
Chiesa has made 131 appearances for Juventus in all competitions and played a pivotal role in helping them to the Coppa Italia title last season.
His nine goals in 33 Serie A appearances are his highest goal tally in a single league season, while he also created more chances (54) and recorded more completed dribbles (35) than anyone else in Juventus’ squad in the top-flight.
There has been interest in Chiesa from Chelsea and Bayern Munich, but the Italy international is yet to make a decision on his future with just one year remaining on his Juventus contract.
The others rumoured to be on Motta's upheaval list include Wojciech Szczesny, Weston McKennie, Mattia De Sciglio, Daniele Rugani and Arthur.
The Spain striker struck just after the hour mark before Federico Chiesa's improvised finish and a late Cristiano Ronaldo strike secured an important three points for the Serie A champions.
Having been held to a draw by Hellas Verona last time out, this was an important match for Andrea Pirlo's men, although they looked far from their best in a frustrating first-half performance.
The introduction of Morata helped to turn the tide as Juve moved to within seven points of Inter and three of second-placed Milan, with Ronaldo's effort making the Portugal star the first player to score 20 goals in each of the past 12 seasons in Europe's top-five leagues.
Riccardo Marchizza nearly caught Juve cold seven minutes in, turning and shooting just wide of the left post following Diego Farias' pass.
There was little Juve threat to speak of until Ronaldo, making his 600th career league appearance, smashed a strike off the base of the post three minutes before the break.
The home side's best work was coming down the left, Weston McKennie almost capitalising on a loose backpass and Dejan Kulusevski sending over a cross that Ronaldo could not meet with conviction.
Spezia did not heed the warning and substitutes Federico Bernardeschi and Morata combined from that same position, the latter finishing at the near post and the goal awarded after a VAR review.
With Morata keeping the Spezia defence busy, Kulusevski found Chiesa in the box and, after his initial shot was saved, he expertly hooked in the rebound for 2-0.
Ronaldo was frustrated by goalkeeper Ivan Provedel from a free-kick but left the keeper with no chance, netting a crisp finish a minute from the end of normal time.
Wojciech Szczesny did not have a save to make until the final kick of the match, when he pushed away Andrej Galabinov's tame penalty to deny the visitors a consolation.
Federico Chiesa got himself off the mark in Liverpool red, but Arne Slot said he must continue to show his quality moving forward.
