Manchester United veteran Casemiro swapped shirts with Fulham's Rodrigo Muniz at half time of their Premier League game.
The Red Devils were beaten by Fulham on Saturday, with Muniz playing his part as his team secured a late winner.
Casemiro, who came off shortly after the start of the second half, appeared friendly towards Muniz at half-time.
Muniz also met with Brazil coach Dorival Junior last week.
The striker hasn't been capped at any level by his country.