"Tomorrow is not the World Cup, there are players that are not included but have their chances intact as is the case with the players included", said Lopetegui, before addressing former Real Madrid striker Morata's situation.
The pair worked together during Morata's two-year stint with I Bianconeri and it was a partnership that worked out well for both, as the Spain global helped secure two Serie A titles and two Italian Super Cups during his time in Turin. "He had physical problems, was inactive for a while, and we thought it was better to bring other players".
"There are still two months for every player to prove they deserve to go to the World Cup".
Morata was included for friendlies against Russian Federation and Costa Rica back in November, but since then has really struggled at club level and has paid the price with Spain.
'Usually with the national team, you can call also players who are not playing with regularity [with their club].
"This was the right time for them to come due to their form and the current situation in the squad", Lopetegui said at a news conference. His options of going to the World Cup are still intact. "It just gives him an option to compete for a spot".
Diego Costa, Lucas Vazquez, Iago Aspas and Rodrigo are involved for Spain, which leaves the Chelsea outcast in a very hard position. Chelsea's Pedro Rodriguez and Victor "Vitolo" Machin were left out.
Spain face Germany in Dusseldorf on March 23 and Argentina four days later at Atletico Madrid's Wanda Metropolitano stadium.
"With Dani and Marcos we felt it was the right moment".
Alonso, who played at under-19 level for Spain, has made 28 Premier League starts for Chelsea but the 27-year-old had been not made the senior team until now.