Earlier this week, the pair had their fans in hysterics with some classic social media tomfoolery.
The flying winger, wearing flip-flops, raced Felix, 25, who was driving a go-kart – beating his missus hands-down in a sprint.
And earlier in the month, they leaned a helping hand to those on lockdown in Brazil by kindly handing out supplies from a carload of goodies.
But who is the brunette beauty that has caught Costa’s eye?
Felix has garnered quite the reputation on social media, and is a major influencer.
The Brazilian has amassed an astonishing 417,000 followers on Instagram, who stay tuned to all her lifestyle tips.
From pictures inside flashy motors clutching a Luis Vuitton handbag to loved-up shots with the ex-Bayern Munich star, Felix lives a life to envy.