Mercedes top charts on day one
Mercedes picked up where they left off in 2019 after dominating the opening day of testing in Spain.
Lewis Hamilton set the quickest time after completing 94 laps of the Circuit de Catalunya in Barcelona. He was the only man to break the one minute 17 second barrier after setting a time of 1:16.974.
Team-mate Valtteri Bottas was second, three-tenths adrift of the six-time world champion.
Perhaps surprisingly, Sergio Perez was the best of the rest in third, with the Mexican showing some good pace in the Racing Point car.
Red Bull and Ferrari, who are expected to complete the three-horse race for the title this season, were further down the order than anticipated, with Max Verstappen half a second behind Hamilton.
Ferrari's Charles Leclerc was way down in 11th, 1.3 seconds off the pace as he deputised for the unwell Sebastian Vettel.
Reliability was impressive throughout the whole field, with all teams putting in at least 100 laps in their new cars and there were no session-stopping red flags.
Testing continues on Thursday and Friday before teams reconvene next Wednesday for another three-day shoot-out.
Dan McCarthy is a reporter who is very knowledgeable about football at all levels, and a keen Leeds United fan. He also follows darts, snooker, motorsport, and rugby league.