Lando Norris finished fifth at the Styrian Grand Prix but believes Ferrari remain a major threat to McLaren and will cause them problems at some events.
Norris had a quite drive on his way seventh top five of the 2021 Formula 1 season to retain his fourth position in the Drivers' Standings.
"They [Ferrari are] just a little bit up and down," told RacingNews365.com and other select members of the press. "It's not like they are in trouble every race. A lot of tracks will suit them more than us.
"Considering how much they struggle in the straights still, on the GPS, they are one of the best in the corners. Similar to like Mercedes and Red Bull in a lot of corners.
"They're a big threat at the moment. That's why we're not taking anything for granted at the moment. We still have to keep chipping away and improving the car because once they put it all together, they can easily be ahead of us. As soon as they solve their problems in the race, then they are flying."
Norris managed to stay ahead of Red Bull's Sergio Perez and Mercedes' Valtteri Bottas in the early part of the Styrian GP. But he opted to not put up much of a fight to ensure he could finish at the head of the midfield. Nevertheless, he enjoyed battling F1's top two teams.
"I already knew on Saturday who I was going to be racing against so it was quite straightforward to let them go," said Norris.
"The fun comes from knowing I'm in a worse car, and I'm ahead of them. I think it's cool. Also, realising how much quicker they are today proves how much better their car is.
"But on a day like Saturday, I outqualified one of them. It shows we are doing a good job in qualifying."