Spain coach Luis Enrique Martínez was delighted with his team's 6-0 win over Croatia on Tuesday in the Nations League.
"It was hard for us at the start because it's difficult to overcome a team that presses as well as Croatia, who had two chances against us, but after that we have been very superior," said Lucho.
"We were at such a high level that it's difficult to criticise anything."
Lucho said the best thing was "seeing the attitude of hte players during the whole week. What I liked best of these 10 days was their attitude on and off the pitch and how we did this in as few sessions that we had."