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.
Antoine Griezmann secured Champions League qualification for Atletico Madrid with a hat-trick in a 3-0 triumph at Getafe on Wednesday in La Liga.
Dortmund overturned a 2-1 deficit from their quarter-final first leg against Atletico to win 5-4 on aggregate and will now renew their acquaintance with PSG, who beat Barcelona 6-4 over two legs to book their semi-final berth.
Antoine Griezmann scored twice as Diego Simeone's men moved to within four points of their opponents and pulled five clear of fifth-placed Athletic Bilbao in the race for Champions League qualification.
Antoine Griezmann said Atletico Madrid will have to "suffer" at Borussia Dortmund to reach the Champions League semi-finals.
Atletico Madrid earned a 2-1 Champions League quarterfinal first-leg victory over Borussia Dortmund on Wednesday, surviving a late onslaught from the visitors.
The duo are the underdog sides remaining in this season's quarter-finals, with the other six teams either among the elite
"(Saul) entered the game well and scored a great goal," Simeone told Movistar.
Lewandowski set up goals for Joao Felix and Fermin Lopez either side of striking himself to pull Barcelona second, eight points behind leaders Real Madrid.
Atletico looked dead and buried when Dimarco pushed home Inter's opener.
Atletico Madrid are hoping Antoine Griezmann's injury is nothing more than a sprained ankle after the forward was substituted in their 1-0 defeat by Inter Milan in the first leg of their Champions League last-16 tie, manager Diego Simeone said.