It began the last day of the first series of pre-season testing in Barcelona

The fourth day of the first series of tests of the teams in Formula 1 starts near Barcelona. Pilots working on new cars for the 2016 season, again only team to Sauber test new parts with the old car. Lewis Hamilton and Nico Rosberg will again ride together on the track "Catalonia" while their other rivals will have one in the car for the day. Fourth last day of the first series of tests for season 2016 Formula 1 continues until 19:00 GMT.

Full list of pilots testing the track near Barcelona:

Mercedes - Lewis Hamilton / Nico RosbergFerrari - Kimi RaikkonenWilliams - Felipe MassaRed Bull - Daniel KwiatForce India - Alfonso Selis Jr.Renault - Kevin MagnussenToro Rosso - Max VerstappenSauber - Felipe NasrMcLaren - Fernando AlonsoManor - Rio HaryantoHaas - Esteban Gutiérrez