With both Red Bull drivers insisting they won't give Rosberg and Hamilton an easy time if they find themselves in a position to challenge for the win, it was revealed that Wolff had in fact called Verstappen's father to request his son 'play safe' on Sunday, after Verstappen and Rosberg banged wheels in Mexico. That reportedly didn't go down well with either Verstappen or Red Bull advisor Helmut Marko, whilst Horner described Wolff's comments "total rubbish".
"Jos told me when he got here on Thursday and I was a bit surprised that Toto was calling another father's driver from a rival team," Horner told Sky Sports F1.
"I think Jos was a bit surprised when he put the phone down to Toto that not only was he commenting on behalf of Mercedes, but Ferrari as well, that the way Max was conducting himself wasn't winning himself any favours and that he should wind his neck in.
"I've never heard of a team principal calling up other drivers fathers before, but obviously Toto felt the need to."
When asked how he felt about the comments, Horner said: "It's total rubbish to be honest. If Toto wants to have a race just for his drivers this weekend, we can do that at 11am tomorrow and we can have the grand prix at 2pm, where everybody can race.