Reigning double Formula One world champions Red Bull rounded off a terrible opening week of pre-season testing as they ended the fourth and final day in Jerez having completed a total of just 21 laps.
Williams' Felipe Massa was fastest on Friday with a lap of 1min 29.023 mins as the teams powered by Mercedes engines continued to make a strong start.
Ferrari's Fernando Alonso was second after logging a mammoth 114 laps, whilst Force India's test driver Daniel Juncadella was third.
The headline story of the day, though, was once again the disappointing showing by Red Bull as for the third day in a row they decided against running in the afternoon.
Aussie Daniel Ricciardo had managed to get...
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