Simeone said in an interview that he was happy for Thomas' transfer to Arsenal at the deadline.
The £45 million transfer of the midfielder was finally finalized on the last day of the transfer window. But Simeone still sent his best wishes to Thomas and supported the 27-year-old player's success at the Emirates Stadium.
Simeone said in an interview: "In this case, we can't give many opinions."
"These decisions were made based on the possibility of existence. As for Thomas, everything that happened to him made me happy. I still remember when he first emerged."
"He went to Almería and it is difficult for him to find a stable position there, but he is an extraordinary player. He will do well at Arsenal and we wish him all the best. We are very much love him."