Red Bull Team Principal Christian Horner raised a "few comments" about Carlos Sainz's defensive driving on Max Verstappen during the opening laps of the Italian Grand Prix.
The Ferrari driver managed to hold on to the lead in the opening 14 laps of the race, fending off Verstappen when he made any attempts to overtake into the Rettifilo Chicane.
Sainz fought hard to keep the position, but eventually had to let Verstappen past on Lap 15 of 51 when he made a mistake and locked up into Rettifilo and gave Verstappen a run through Curva Grande.
While Sainz's defensive moves raised eyebrows, Horner believes it was on the limit when discussing his driving with Sky Sports: "There was a few comments raised. Carlos was very robust, he was a little late at times, he moved a bit.
"But he's driving a Ferrari, at Monza, he's gonna defend for his life.
"We kind of expected it. When both [our] guys managed to get down inside, they made that move stick."
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"We had to do it the hard way, the Ferrari's were very quick today. We saw that in qualifying," said Horner.
"Max had to get that pass done and then we were able to pull out a gap. They [Ferrari] were just a little bit harder on their tyres than we were.
"Checo was making moves to get that one-two, which of course, gives Max that 10 victories in a row that breaks a record from Sebastian [Vettel] 10 years ago which is an incredible moment."