Barcelona continue to be linked with an interest in the 23-year-old midfielder, with the Spanish club said to be weighing up a move at the beginning of 2022 despite their financial issues.
The 26-year-old was a regular for the La Liga champions during the 2020-21 season, making 41 appearances in all competitions.
He still has more than five years remaining to his contract at Wanda Metropolitano.
The Spain international, who still has more than five years left on his contract at Wanda Metropolitano, is said to be available for transfer in the upcoming market.
The 24-year-old has played a starring role for the Yellow Submarine in the 2020-21 season and helped the club in their progression to the Europa League final.
Manchester United continue to be strongly linked with the centre-back, who could be available for around €30m in the summer transfer window.
Spanish outlet La Razon suggests that Arsenal manager Mikel Arteta is searching for a new stopper.
Simon, who has been a regular for the Spanish outfit for the past two seasons, is said to have been identified as a long-term option at the Emirates.