Since being released at the end of June, the goalkeeper has declined a number of offers.
Real Betis reportedly want to sign David de Gea
He was linked to big clubs like Bayern Munich and Real Madrid but both moves collapsed.
However De Gea could be set to return to Spain with Betis registering an interest, claim Fichajes.
The report also suggests Valencia were considering an approach for the 32-year-old.
But Betis appear to be the frontrunners after talks with former Manchester City star Claudio Bravo fell through.
De Gea is now believed to be weighing up the contract offer from Betis, having already turned down several teams.
Inter Milan were understood to have been considering De Gea as Andre Onana’s replacement after the keeper joined United.
While Saudi Arabian giants Al-Nassr also made the Spaniard an offer.
Despite being unattached De Gea has continued to train hard and recently shared a video to appeal to potential suitors.
He could be seen working on his footwork, catching and kicking while wearing a Kevin Durant basketball jersey.
De Gea has been keeping in shape as he searches for a new club
The 32-year-old worked on his kicking
He also worked on his handling in the video posted on Instagram
The ex-Man United keeper is able to find a new club after the transfer window closes given he is a free agent
De Gea has been without a club for over eight weeks
But he’s determined to be ready for his next adventure
Alongside the clip, he added the caption: “Work hard. Push yourself ⚽️.”
Reacting to the social media post, ex-Man Utd team-mate Bruno Fernandes said: “Muy bien Kevin 👏🏼😅.”