"Big for the Bundesliga. Real [Madrid] for him next," reacted German account @nside_pro_footb.
On the influential Liverpool account, The Anfield Wrap, fans still reeling from Jurgen Klopp's announcement reacted.
"I think the fans love Alonso more than Alonso loves our club. We need to move on," said @jayellcee7791.
"Depressed no matter who we get," bemoaned @styz0r.
"I was all in on Xabi to be honest, none of those other names inspire much confidence in me," posted @TheGraySon72.
Others were more upbeat such as @PhilBlundell, who said: "The thing with managers is that there’s always other ones. If someone doesn’t want to manage Liverpool, which is the case here, there is absolutely no point wasting a second on it."
"Xabi's loss," said a defiant @paulmcmasterLFC. "Whoever we get is inheriting a superb group of footballers."