Lewis Hamilton endured a difficult afternoon in the Mercedes at the Monaco Grand Prix
Hamilton had set the fastest ever time during a Monaco Grand Prix race weekend in the morning as the faster 2017 F1 cars ripped up the record books.
However, struggles set in after lunch as the Brit complained over the radion of being unable to get heat into the tyres while F1 World Drivers' Championship leader Sebastian Vettel was the first man into the 1min12s, leading the field by nearly half a second.
Pirelli had initially nominated the minimum tyre pressures as 19 psi and 18 psi on the front and rear tyres respectively, but lowered that yesterday to 17 and 16.5.
The Ferrari car is understood to be better at heating up the tyres at lower pressures while Hamilton complained over team radio about struggling to get them up to temperature, a problem confirmed by team-mate Valtteri Bottas.
Monaco Grand Prix Free Practice 2 results
“Getting lap one out of the tyres for us is impossible,” Bottas said.
“We need a few more warm-up laps.
“I wish we had softer compounds.
“I can’t be too happy with P8 and P10 as a team.
“We made quite a big set-up change trying to help balance through a few corners but we went in the wrong direction in other places.
“We tried something at the end of FP2 that was better but the tyres were all dead.
Get Quotes on Home Insurance
“At least we have enough time to work things out.
“We learned a lot from today.”
Thanks to a Monaco quirk, Mercedes will have a whole free day to look at the data and adjust the set-up of both drivers as the circuit reopens to the public on Friday.
"It gives the guys more time to work on the car rather than everything rushed tonight," Hamilton said.
"Something went wrong in this session and we've just got to work out why.
"This afternoon, for whatever reason, the tyres weren't working."