Lot of people undermined Madrid with their squad in CL and LaLiga last season too but they came out as a winner but they showed great spirit and became champions of both. Madrid are strong candidates in my opinion. Barca are also a strong candidates but I have my slight doubts still.
It was this doubt that motivated the Real Madrid players last season by beating their opponents in the UCL by becoming champions last season and Real Madrid also winning Laliga. that was a really great thing for them in the previous season. for the upcoming season Real Madrid are still a strong enough candidate in the UCL competition or in the domestic league so that other teams may find it difficult to beat them.