Robert Kubica described his Williams FW42 as "very difficult" to keep on track at the Canadian Grand Prix, as his 2019 struggles continued.
Kubica lacked pace in qualifying and spent much of the 70-lap race at the rear of the pack, coming home three laps down, having been around a minute behind team-mate George Russell.
"Unfortunately there is no magic," said Kubica.
"[Qualifying] was already difficult with handling and generally I have no grip.
"So [in the race] with high fuel and track conditions hotter, and longer stints, it was even more difficult.
"I was pointing the steering wheel and the car was turning without really turning the steering wheel. I don’t know what to say honestly. It was very difficult to keep it on track.
"Just overall grip is missing. I honestly don’t know what to say."
Kubica jumped Russell at the start but soon fell behind the reigning Formula 2 champion.
"Well yes [I had a] small fight," said Kubica.
"I overtook him into Turn 1, he got me on the straight line, but already on lap one I arrived at Turn 6 and Turn 8 with the rear just sideways before even turning the car so it was difficult."
