Casemiro allegedly had his house robbed while the Real Madrid star was playing against Atletico Madrid.
According to El Chiringuito TV, his wife and daughter were still inside when the alleged break-in occurred.
The Brazil international is the latest high-profile player to have his house robbed while playing.
Alvaro Morata, Zinedine Zidane, Lucas Vazquez and Isco have seen their houses broken into in recent times.
Real Madrid stayed top of LA after a 0-0 draw with derby rivals Atletico Madrid on Saturday.
The lackluster encounter at Atletico’s Wanda Metropolitano Stadium benefited two-time champion Barcelona, who won 2-0 at Getafe to move within two points of the leader.
Los Blancos stayed one point ahead of Atletico and promoted Granada, which defeated Leganes 1-0 for its fourth win in seven matches.
There were few chances in the Madrid derby. Atletico’s best opportunity came less than 10 minutes into the match when teenage forward Joao Felix went close following a counterattack.
Goalkeeper Jan Oblak came to the rescue for the home side with a reflex save denying Karim Benzema’s 75th-minute header.
The result extended Atletico’s four-year winless streak at home against Real in the league.
It was the first match between the rivals since Atletico stunned Real 7-3 in a friendly in the United States in July.