"The day was okay," insisted Nico Hülkenberg. "Unfortunately we could not run our aero programme as planned due to the rain in the first session this morning, but you can't change the weather and the situation was the same for everyone.
"We were able to work through the whole programme during the second free practice without any problems," he added. "The new rear wing is an improvement. However, if it's enough of an improvement to catch up to our competition I can't say yet."
"The stability of the car has improved, which gives me more confidence to push during the long runs," contributed his team mate Esteban Gutiérrez. "We were able to analyse the new parts we brought to Barcelona. The team is doing a good job and we are pushing to be able to close the gap to our competition.
"It's hard to judge where we stand at the moment," he admitted. "I think qualifying [on Saturday] will show where we are at compared to the rest of the field."