Lando Norris believes there will be an eight-car challenge for pole during qualifying for the Hungarian Grand Prix on Saturday. (More Motorsport News)
The Brit set the pace at practice on Friday, just edging Max Verstappen to the top of the pile as they prepare to continue their rivalry at the top of the drivers' standings.
Carlos Sainz finished third on a day when the action was interrupted following Charles Leclerc's crash, where he spun into the barriers on Turn 4.
Norris, who finished third in the British Grand Prix last time out, is aiming to get his second win of the season and admits it is tough to call who will come out on top in qualifying, especially after Mercedes' recent success.
Asked about his chances of taking pole after practice, Norris said: "From today, pretty reasonable. It was a nice lap. Today, we could get a good amount of it, but tomorrow's another day.
"I think it's close between us, Mercedes, Ferrari, Red Bull. I feel like we have eight cars here who are going to be fighting for a pole, and even some other cars that looked very quick, like the Haas even.
"A good first day but definitely a little bit more work to do if we want to be a bit more comfortable."
Mercedes have won the last two Grand Prix, with George Russell claiming an unexpected win in Austria before Lewis Hamilton ended a three-year wait for victory with a triumph at Silverstone.
However, Hamilton, who finished seventh in the second practice session behind team-mate George Russell in fifth, was not optimistic about his chances following practice, explaining his car was struggling to cope with the heat in Budapest.
"[It] felt just as bad as it does normally when it's hot," Hamilton said. "Today's not been a good day, really.
"The car hasn't felt good setup-wise, but we think we have an idea why, and we'll just work overnight. It's not the best prep so far.
"[We made] little tweaks [in between sessions] but the car was pretty much the same. There's a particular thing that we left - that we're changing into this weekend - that we probably need to go back on.
"It's all relatively close otherwise. We couldn't do the pace that the other guys did today, but the long run, pace was pretty decent at the end."
