Red Bull driver Daniel Ricciardo explained that his former team-mate Sebastian Vettel could have set the bar too high at Ferrari following his success at the Austrian-based outfit.
Vettel enjoyed one of the most rewarding runs in the sport’s history, claiming four World Championships in a row.
However, the German has had a frustrating time since joining Ferrari.
Ricciardo reckons that Vettel's journey in Formula 1 is different to any other driver, so he doesn’t know what it feels like to lose.
"I think Seb is pretty unique," the Aussie told The Age.
"He is probably someone who does live and breathe it more than most and, you know, it seems like … the majority of his life is the sport and being world champion.
"And again, that is not a bad thing, but when things are not going as you want, those frustrating … things can build up because that is what you are really looking at in life.
" I think for him he had a dream with Red Bull, you know one of the best runs in history, four straight titles.
"So I think for him he probably expected to have a dream run with Ferrari and it hasn't come as soon as he would have liked.
"Yeah it's frustration, but he is super talented, I think that sometimes he is his own worst enemy in terms of that frustration side of things … When he cools down he's cool."