A last minute change to the FC Barcelona squad.
Barcelona are yet to confirm the reasons for Messi's absence, but will feel that they have enough quality at their disposal to cope without him.
In the photo, Messi accompanies the picture with the following message: "Welcome Ciro!" His mother and he are doing really well.
Carla Roccuzzo, the sister of Messi's wife Antonella Roccuzzo, confirmed the birth of the couple's third son, Ciro took place this afternoon here, tweeting that she was very happy.
Argentina worldwide Messi has scored four goals in his last three league games for leaders Barca, who would go 11 points clear with victory at La Rosaleda.
Ernesto Valverde's side, meanwhile, have the chance to extend their lead at the top of La Liga to 11 points with a win over Malaga.
Messi has enjoyed another standout season for Barca in 2017-18, with 32 goals netted in just 41 appearances.