Jorge Sampaoli has taken the blame for Argentina's 6-1 thrashing by Spain on Tuesday night.
The 2010 World Cup winners cruised to victory during the friendly at the Wanda Metropolitano in Madrid, with Diego Costa firing the hosts ahead in the 13th minute.
Isco then scored either side of a header from Argentina defender Nicolas Otamendi, then Thiago Alcantara added a fourth, with substitute Iago Aspas also on the scoresheet before Isco netted his third with 16 minutes.
"I take the blame for the goals, don't point to the players," Sampaoli told reporters. "The difference [between the sides] in the game wasn't as large as the result.
"Lionel Messi trained with us, but then he felt tired and couldn't play. He was with the group all the time because he is very involved for the World Cup. He has kept close proximity to the national team, helping the new guys out."