Russell tops red-flagged final morning

Russell enjoyed a scrap with Max Verstappen over the bragging rights in the morning session, but the Mercedes driver won out with his 1m19.233s on a set of C5 tyres – the fastest time of the Barcelona test so far.

Encouragingly for Russell, he chalked up the most laps in the morning session, touring the Circuit de Barcelona-Catalunya 66 times.

But in a stop-start final hour of the session, the running was truncated by a late red flag for the stopped Sebastian Vettel, whose Aston Martin appeared to suffer a power unit-related failure which brought affairs to an early close.

Fernando Alonso had set the early pace but, as early as the first hour of running, his Alpine began to produce a copious amount of fumes – and the Spanish driver came to a stop on the outer track after Turn 13 to produce the first red flag period.

Alpine confirmed during the morning session that Alonso’s problem was hydraulic related, and thus the team would bring a close to all further running for the day.