Robert Kubica is not reading much into Williams teammate George Russell's strong performance at the Hungarian GP.

The Pole watched on as the Mercedes junior missed out on Q2 by mere fractions in qualifying and held onto his 16th place grid slot in the race.

This comes after a raft of upgrades were introduced at Hockenheim which appear to be offering Williams a way forward after another season spent at the back of the grid.

However, given the unique characteristics of the Hungaroring, Kubica wants confirmation of the apparent gains after the summer break.

"We have to wait and see," he was quoted by F1i.com

"For sure George had a much better performance but the car was the same as in Hockenheim, and in Hockenheim, it was not looking like we made big progress.

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"Putting it in a different way, we made progress but also the others did so the gap was still big.

"Here he managed to qualify in front of a few cars and he was much closer to the pack. We hope we will be able to continue with this trend although it will require a lot of work," he added.

"After the break, we have completely different tracks so we have wait and see if we'll be able to close the gap and stay more attached to the others are George was here."

Also frustrating Kubica is his performance which remained some way off what Russell in Budapest, having been out-qualified by 1.3s and beaten by a lap in the race.

While that is one of the bigger gaps seen this year, the one-time Grand Prix winner has often been outclassed by the 21-year-old in 2019 and concedes he has struggled more than his teammate.

"It has been complicated," he admitted. "Overall there are a few things that we have to get on top of apart from the performance of the car.

"I think once we fix them or we have more consistency it will be much easier, so hopefully the second part of the year we'll get on top of it and then at least we'll be able to have consistent performance every weekend, which will be much easier.

"You can always improve everywhere, but as I said, we have to have consistency.

"Once you have consistency in the car it will also be much easier from the driver point of view to be consistent and to work on small details and this is in the end what it comes down to in F1."