Daniel Ricciardo says it would be "naive'' to rule out Mercedes and Ferrari from challenging for pole position in Mexico after Formula One's two leading teams struggled to match the impressive pace of Red Bull in Friday practice for the Mexican Grand Prix.
Red Bull ended Friday's two practice sessions at the Autodromo Hermanos Rodriguez fastest, with Max Verstappen leading Ricciardo in both sessions. Red Bull was over 1.2s clear of the rest of the field, which was led by the Renault of Carlos Sainz.
Despite enjoying a sizeable advantage over Mercedes and Ferrari in practice, Ricciardo expects both teams to be back on form on Saturday.