Felipe Massa ended the second free practice session at the Circuit de Barcelona-Catalunya inside the top ten, but felt it was a good day at the Spanish track.
The Williams Martini Racing driver was amongst those moaning about tyres on Friday, and the Brazilian finished down in fourteenth in first practice before improving to ninth in the second.
“The session was a good one I would say,” said Massa. “The medium and the hard tyres were quite tricky to run, and we did struggle with them a bit, especially with overheating.
“But, many others were struggling to make these tyres work too, so it’s not so bad. On the whole it was quite a positive day.”
Team-mate Lance Stroll was disappointed with his own display during practice, finishing eighteenth in FP1 and seventeenth in FP2, and admitted to his own tyre struggles on the Medium compound.
He also admitted a mistake on his first lap on the Soft compound prevented him from setting a representative lap time in FP2, and he is hoping to turn his weekend around on Saturday.
“It was a tough day for me just putting everything together and getting everything to work,” admitted Stroll. “I didn’t get the medium working very well, and it was particularly difficult to find grip and stability in the car.
“It was quite easy to miss corners, have snaps and make mistakes, especially when you lose the temperatures in the tyres, so I have to look tonight to try and make it better for the race.
“I made a mistake on my first lap on the softs, then did two more laps and I finally did a lap time, but the tyre was gone at the end. Not the end of the world, as it is only practice.”