I kind of think asking riders (or other athletes) about doping is pointless. Never ever have I seen or heard an athlete win something and casually say during the press conference say they doped majorly when asked about it. It's like the won question where you know you're gonna get a bs answer.
Btw, do we know any other spanish cyclist who actually does English interviews? Even Nadal doesn't speak English too well, while tennis is a much more anglophone sport and I think the average tennis pro is quite intelligent compared to a lot of others sports