Lewis Hamilton dominated the first practice session of the day at Monaco, setting the best time of the session early on and remaining on top of the timesheet throughout. All Renault powered cars however, with Red Bull Racing and Toro Rosso were on form today, with Verstappen fastest, a tenth off of Hamilton's best.
Red Bull's Christian Horner was proud as a monkey at Barcelona, where his team finally showed up with a short nose, following 14 internal and 4 FIA tests (as reported by AMuS), until at last a design was found to match the regulatory requirements. 2 days later however, the same Horner was quoted as saying “we'll have to look at 2016″, effectively writing off the 2015 campaign after another disappointing race.
McLaren Honda endured a difficult Spanish Grand Prix. Jenson Button suffered severe stability problems that made him abandon all hope for points this season, saying it was the scariest drive in his career.
Ferrari have brought a dramatic car update to Barcelona, and it appears there was hardly an exaggeration when Arrivabene claimed beforehand that 70% of the car was changed. Clearly, the team has put a lot of effort in getting this update package together, but with the changes so dramatic, Ferrari nonetheless opted for Vettel to run with the updates and Raikkonen without, getting a full race of comparison data. On Friday, Raikkonen was still seen running Ferrari's new update packages, including a new sidepod shape, featuring a new outer shape over their entire lengths.