It was claimed at the time that United had made a massive €100m-plus offer for the Portugal international.
And on Friday, Spanish reporter Manu Sainz declared a €150m offer from an unnamed Premier League club had been rejected by Atletico in January.
Felix only moved to Atletico last summer from Benfica for €120m.
However, there's claims the attacker is unsettled in Madrid as he's unhappy playing the style of football demanded by Atletico coach Diego Simeone.
Felix scored twice in victory over Osasuna this week.