The Italian champions remain undefeated in the competition this season and sit fifth on 10 points at the midway point of the new league phase format.
"He's working well, he's training well... it's important for his growth. As long as there is humility, the heart always responds," Simeone told Movistar, while giving credit to Nahuel Molina's pass that led to Giuliano's goal.
Even a single point would have flattered Diego Simeone's side but they took all three when the Argentina international, on as a substitute, finished Antoine Griezmann's cross at the back post.
The European top-flight has switched from a group stage to a league phase where 36 teams play eight matches each, with the top eight in the table progressing directly to the next round, while the next 16 teams enter a two-legged playoff.
"It's amazing, to get a last-minute goal like this is always fantastic and it's good to give the fans something to cheer about," Atletico's former Leipzig striker Alexander Sorloth told DAZN.
Diego Simeone's Atletico Madrid shared an entertaining 2-2 draw with Villarreal as they began their La Liga campaign on Monday.
After a summer dominated by Spain, with La Roja storming to Euro 2024 triumph and their youngsters claiming gold at the Paris Olympics, the focus now turns to Spain once again as LaLiga kicks off on Thursday.
The 24-year-old Argentina international's exit marks a record sale price for City, eclipsing the 50 million pounds Chelsea paid for winger Raheem Sterling in 2022.
The 24-year-old cost City just £14 million when he signed from River Plate in January 2022 and his since enjoyed a meteoric rise, helping Argentina to World Cup and Copa America glory, as well as winning two Premier League titles and the Champions League at club level.
Griezmann's superb header after 64 minutes split the teams, although visitors Mallorca spurned some good openings in the final stages.
Antoine Griezmann struck a hat-trick in a 3-0 win over 10-man Celta Vigo to help Atletico Madrid climb provisionally second, in hot pursuit of their city rivals.
Atletico took an early two-goal lead with Antoine Griezmann and Memphis Depay scoring from close range, while Nahuel Molina extended their lead in the 36th minute in a counter-attack.
Atletico Madrid drew 0-0 at Real Betis in a dour clash.
Atletico Madrid striker Memphis Depay scored with a stunning long-range strike in the second half to help secure a 3-1 home win over promoted Granada in their LaLiga opener on Monday.
Antoine Griezmann shone as Atletico Madrid thrashed Cadiz 5-1 on Wednesday to climb above rivals Real Madrid into second in La Liga.
Atletico Madrid cut the gap on second-place rivals Real Madrid to two points with a 3-1 win over Real Mallorca in La Liga on Wednesday.
Portugal forward Joao Felix said he left Atletico Madrid to join Chelsea on loan because he was struggling to get used to the Spanish side's style of play, adding that coach Diego Simeone's philosophy is not beneficial to every player.
After retiring from playing in 1991 he went on to manage Rayo Vallecano, Racing Santander, Sevilla, Atletico Madrid, Real Zaragoza, Real Valladolid, Malaga and Granada 74.
Real Madrid's Brazil forward Vinicius Jr expects punishment to be handed out by Spanish authorities against hate crimes after a mannequin wearing his No. 20 shirt was hung from a bridge in front of the club's training centre ahead of the Madrid derby.