However, reports from The Telegraph suggest United fear they will still lose the Spaniard in the summer.
His contract expires in June, although the club have the option of extending it for a further year.
They will almost certainly take up that option but risk losing him on the cheap in January or on a free the following summer if he is not sold immediately after the extension is triggered.
United want to extend his deal beyond that but reports claim De Gea is reluctant to commit after their struggles this season.
Jan Oblak is reported to be unhappy at Atletico Madrid (Image: GETTY)
And United could look to renew their interest in Oblak if they are forced to sell.
The Slovenian is regarded as one of the world’s top goalkeepers and was recently named the best stopper in La Liga.
He conceded just 22 league goals in 37 league appearances in 2017-18 and racked up a whopping 22 clean sheets.
Speaking at the awards ceremony, Oblak said he hoped to stay at the club but hinted he might leave in the future.
Oblak kept 22 clean sheets in La Liga last season (Image: GETTY)
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Oblak could replace David de Gea at Manchester United (Image: GETTY)
"I like to hear people say that I'm the best goalkeeper in the world," he said.
”I work hard to do that but my award is a result of the hard work of the whole team because they help me a lot.
"I thank them, the coaching staff and the fans. I hope that I will continue for many years at Atletico and in LaLiga Santander.