Mercedes have brought a number of upgrades to their cars at Barcelona, mainly aimed at improving the pace on longer runs. Although there may be an improvement, both race drivers are still calling for further improvments. Lewis Hamilton and Nico Rosberg both completed lots of laps during today's free practice sessions, mainly aimed at evaluating the new upgrade package along with the hard and medium Pirelli tyre compounds. Lewis Hamilton said there is an obvious impact of the upgrades, but that he was less happy in the afternoon when temperatures were higher and the team focused on longer running: 'The team have done a great job to bring our upgrades here this weekend and whilst I could feel...
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