Former double world Formula One champion Fernando Alonso has hailed the new Ferrari F10 as the best car he has ever driven.
Alonso was 1.5 seconds slower than McLaren in last week's Jerez's test, but he explained that Ferrari were yet to show their true potential.
The 28-year-old, who won the world title in 2005 and 2006 with Renault says Red Bull, McLaren and Renault have been very quick and have shown their cards, while they are still hiding theirs.
World champion Jenson Button clocked the fastest time in Jerez, while Alonso was quickest in Valencia.
The final test takes place at Barcelona this week before the season-opening race in Bahrain on March 14th.