Pellegrino is not the long term solution. Spanish players are never good in defense. Just look at their European/World Cup performances.
A country that constantly produces tough defenders is Italy, however it is almost impossible to lure top Italian defenders from Serie A.
Maybe we could try to get a promising Italian youngster?
And we can put Josemi, Pelle, Traore together in defence next season and see how many goals we leak. Lol....