The Villarreal man is out for an extended period after tearing his cruciate ligament, and one former Tottenham teammate got in touch to wish him a speedy recovery.
Soldado suffered a ACL injury to his right knee during Tuesday's friendly with Deportivo La Coruna, and will now be out until 2017.
The 31-year-old, who scored 16 times in 76 matches in England, left North London just under a year ago having failed to replicate his goalscoring exploits from La Liga in the Premier League.
(L-R) Kyle Naughton, Younes Kaboul, Christian Eriksen, Roberto Soldado, Christian Ceballos and Ryan Fredericks on the substitute bench
And he impressed in his first season back in his home country, scoring eight times last season and proving himself a creative input with 15 assists to help the Yellow Submarine to Champions League football.
Soldado took to Twitter to thank fans for their support, saying he was looking forward to get past the operation and start work on his return.
Millones de gracias por vuestro apoyo! Deseando pasar por quirófano para empezar a trabajar y afrontar este reto pic.twitter.com/LJfmaoPBRq— Roberto Soldado (@R9Soldado) August 10, 2016
It is a bitter blow for the former Spanish international striker, who is still highly thought of at White Hart Lane despite what was a difficult period in terms of goals.
Soldado has regularly proven his ongoing loyalty to Spurs as his English affiliation on social media. He wished Villarreal teammate Eric Bailly luck in joining Manchester United, before joking that he wasn't really a fan of clubs wearing red in England, and also tweets his support ahead of crunch Spurs matches.
Former Tottenham teammate and skipper Younes Kaboul was one of the first to wish Soldado well after the sad news, with the Sunderland defender telling the forward he will come back stronger.
@R9Soldado have a speedy recovery my friend and you will come back stronger— Younes Kaboul (@YounesKaboul4) August 10, 2016
Kaboul suffered his own serious knee injury in 2012, which ruled him out for an extended period of several months. The 30-year-old, who also left Tottenham last summer, was in dominant form at the end of the season as he helped the Black Cats escape relegation under Sam Allardyce.
Lamine Kone celebrates scoring for Sunderland with Younes Kaboul and Jermain Defoe