Speaking at a press conference on Wednesday, Simeone remained convinced that the 25-year-old would stay at Vicente Calderon despite rumours of a possible departure for the Turk.
“First, I have not heard anything and I have seen it a lot. Everyone can comment on whatever you want," Simeone told reporters.
"The important thing is what he shows on the field. Arda is one of the best players. He shows heart in every one of our matches.
"He has a contract with our club and he shows everyone what he has to offer."
Arda moved to the Spanish side from Turkish giants Galatasaray in 2011. And, after aiding the club to Europa League success in the last campaign, the midfielder has now helped Atletico to second place in La Liga with four goals in 16 appearances this term.
With the January transfer window now open, there are possibilities for the club to sign new players, but talks of bringing in fresh faces in the winter window have not yet started according to the Argentine trainer.
Simeone added: “I have not talked to [director of football] Jose Luis [Caminero] and the people of the club. During the coming days we'll get together and see if it is necessary or not."
With talk of winning the title circulating, the coach has remained calm and does not want to get ahead of himself.
He said: “We're talking about six months from now and the reality is today. The reality is going to be what we can do. We should not move away from the line we have marked for ourselves this year."