The Portuguese, who now plays for Saudi side Al-Nassr, had claimed he was owed around 19.5 million euros ($20.81 million) of outstanding wages by his former club relating to a paycut agreed during the COVID-19 pandemic.
“The decision was incorrect,” Castro said, speaking to reporters after the match.
The 39-year-old scored back-to-back hattricks in three days.
Al Nassr striker Cristiano Ronaldo has once again silenced his critics after grabbing a hat-trick. The 39-year-old scored three second half goals against Al Tai to bring up 33 goals in all competitions this season for the Saudi outfit.
Portugal slipped to a surprise 2-0 defeat to Slovenia in a Euro 2024 friendly in Ljubljana on Tuesday, their first defeat since the arrival of Spanish coach Roberto Martinez who had previously won eleven games in a row.
Rafael Leao, Matheus Nunes and Bruno Fernandes all struck for the rampant hosts in the first half.
Cristiano Ronaldo is set to miss Portugal's friendly clash against Sweden as Roberto Martinez made changes to his squad. Martinez had included the five-time Ballon d'Or winner in his preliminary 32-man squad but has now left him out of his team's next game against Sweden.
Cristiano Ronaldo, who had just recently become the first footballer to achieve 800 career wins, was included in the Portugal squad for the upcoming friendly matches against Sweden and Slovenia.
The 39-year-old Portuguese was the only Al Nassr player to score in the shootout as his Saudi side went out 3-1 on penalties, the tie having ended 4-4 on aggregate.
France, Belgium and Portugal all blinked with a Euro 2024 place in their grasps but clung on for one-goal victories on Friday night which made them the first sides to qualify for next year's tournament.
Former Barcelona player Kevin-Prince Boateng said that he was made to say that Lionel Messi was the best player in the world despite personally believing Cristiano Ronaldo was the better player.
Cristiano Ronaldo made the most of both awful defending and a plume of smoke to set Al-Nasr on the way to a 4-3 victory against Al-Ahli in the Saudi Pro League.
Former Manchester United manager Ole Gunnar Solskjaer has admitted the club's re-signing of Cristiano Ronaldo "turned out wrong".
Cristiano Ronaldo enjoyed a winning debut in the Asian Champions League as he helped Al Nassr to a 2-0 victory against 10-man Persepolis in Iran on Tuesday night.
Five times UEFA Champions League winner Cristiano Ronaldo will begin his quest to add another continental title to his resume on Tuesday when Saudi Arabia's Al-Nassr kick off their Asian Champions League campaign against 2020 runners-up Persepolis.
Ronaldo was lacklustre in his 201st Portugal appearance at the age of 38.
Saudi Pro League (SPL) clubs have splurged $957 million on players in the close season transfer window, according to analysis from Deloitte published on Friday.
"I want more," the forward told a press conference before training with the national side at Oeiras, on the outskirts of Lisbon, ahead of upcoming European Championship qualifiers.
Cristiano Ronaldo was named in Portugal's squad on Friday for upcoming Euro 2024 qualifiers against Slovakia and Luxembourg.