During the Singapore Grand Prix, Toro Rosso driver Daniil Kvyat aggressively defended his position against his Red Bull replacement Max Verstappen, something Red Bull have no issues with.
The Russian kept the youngster at bay for several laps on Sunday, despite the latter attacking the former with an updated Renault engine.
Verstappen, who has been known to aggressively defend against his opponents, saw no problem with the way Kvyat drove but did add that it got quite hectic at certain points during their quarrel.
"No. I should get past by myself," said the Spanish Grand Prix champion, who eventually overtook the 23-year-old.
"He was fighting for his position. You should fight the same [way] against everyone and I think he was doing that. It’s fair.
"It was getting quite intense at one point, going a bit off the track.
"We were just losing a lot of time, and of course after such a bad start you are a bit disappointed. He was a bit aggressive.
"On the one hand I understand it, on the other hand you have to let each other live a bit. If you look at the fight with [Fernando] Alonso and with [Sergio] Perez, then it’s a very different fight."
Team boss Christian Horner agreed with Verstappen, saying that he has no problem with their sister team racing against them.
"They were racing each other," said Horner.
"Points for Toro Rosso are just as valuable as for us. I doubt Kvyat would have listened too much anyway."