Sexing a 3 week old serama

[Johnchickens2]

Hi, I would be happy if you can help me find out if this is a male or female. In one of the pictures you can also see one of the siblings but it's the same white chick in all the pictures. He/she is 3 weeks old. Thank you very much!!!!

 

[GracePoultry]

My guess is male because his comb is bigger than his sibling's, but its a bit early to tell

 

[Johnchickens2]

Thank you. So you mean there is still a chance of a female?