The lesser form (wednesday he was great) isn't really a surprise is it? Every young player has a period of less form, adapting new team, new league etc.. His august month was probably to good, so everyone expected that form in the weeks after. If i'm honoust i didn't know Mata well before he came here, so i tought his first month's weren't that great, if you see 12 months further on, he's just magic from time..