Negrito isn't equivalent to gollywog. The word in and of itself is pretty neutral in a way that gollywog is not and never was. There's a song I half know that is a love song sung to a 'negrita' - it's not a word that implies any kind of condescension necessarily. However, as ever context is crucial. In a heated exchange, there's no good way to use the word 'negrito'. But, if Evra said sudaca first, then he really should not be complaining. Without knowing what Evra said for sure, it's hard to comment.