MADRID (AFP) - Real Madrid star Cristiano Ronaldo drew criticism in the changing room by partying for his 30th birthday hours after a 4-0 defeat by rivals Atletico, media reported on Monday.

Leading sports daily Marca called the Portuguese striker's birthday bash after Real's Madrid derby defeat in the league on Saturday "The Party of Discord".

"Pictures of the celebration did not go down well with Real Madrid's captains" Iker Casillas and Sergio Ramos, Marca reported.

Ronaldo hosted team-mates, including Keylor Navas, Pepe, Luka Modric, Sami Khedira and James Rodriguez, newspapers reported.

"The online social networks were on fire with fierce criticism from fans," reported Madrid sports newspaper AS.

Cristiano's agent Jorge Mendes told Cadena SER radio station on Sunday he was "very annoyed" by the photographs.

"When there is an event that is totally private and then you see someone is leaking pictures of it, clearly you get annoyed," he said.

The agent said the player was "gutted at the defeat" - a claim echoed by other figures close to Ronaldo, including Chelsea and former Real manager Jose Mourinho.

"People spent the first two hours of the party encouraging him because he was sad about the defeat," Mendes said.

Barcelona newspaper Sport reported that some Real players who missed the party were going to "demand an explanation from the Portuguese player and his fellow partygoers".

Real Madrid are just a point ahead of their fierce rivals Barcelona.

Current champions Atletico are three points behind in third place.