The Portuguese international helped La Liga champions Atletico to a 4-1 victory over La Liga champions Atletico Madrid on Saturday.
Joachim Phillips has scored eight goals (six goals and two assists) in his last six games in all competitions this season, the same number as in his previous 33 appearances (four goals and four assists).
Simeone is delighted with the 22-year-old's support and believes he has been on the right track since moving from Benfica to Benfica in 2019 with much of his money.
"He is still growing and it is a very good moment," Simeone told Movistar +. "She is OK. She is OK. We are doing everything we can to help her."
Luis Suarez came off the bench to score his late two goals, scoring the first goal from the penalty spot, and the striker enjoys his role as the club's oldest captain, said Simone Nieto.
"I'm very happy for him," Simeone said. "She is OK. She is safe.
"Before the game he told Joao Felix to score two goals. Well, he wants to compete to win. Everyone has to be involved to win."
Carlos, Simone's father, who died in March, was greeted before the game and the club thanked the Atletico coach for bringing him in.
"I respectfully say I will never forget that," he said. "And thank you to the club."
Joao Felix has won 52 of Saturday's victories, more than any other Atleti striker, with 20 in his second half of Alaves' tally, creating three chances with Yannick Carrasco.
"We are doing well. The team is very good and the individual is very clear in this situation," said Joao Felix.
"We are going through the same spirit to win and score goals. At first, I was refreshed and could do a little more. The desire to win and to score is at the end of the first minute or so.
"It's a natural process for the players. Some start playing and some start on the bench. I have never worked."
Atletico, third in La Liga, travel to England on Tuesday to face Manchester City in the first leg of their Champions League quarter-final.