Ferrari team principal Maurizio Arrivabene said there are “encouraging signs” that his team have made real progress with their 2015 car, but also cautioned that their rivals were masking their true pace.

Ferrari finished quickest in three of the first four days of pre-season testing at Jerez, with Kimi Raikkonen and Sebastian Vettel emerging with the fastest two times overall via Formula1.com – Latest News http://ift.tt/1Ath8T6