Abu Dhabi's one-day test is a combined exercise to hand Pirelli extra tyre data while also providing a chance to rookie drivers to gather valuable miles. All teams ran two cars, one for each assignment.
Russell caused the most notable incident by crashing in Turn 6 four hours into the session after a suspected technical failure punted the Mercedes driver into the barriers.
The incident, which caused significant damage to the W14's front-right corner, forced Russell to sit out the rest of the day after completing 58 laps.
It was the second stoppage of the day after an earlier water leak between Turns 13 and 14 delayed the action. The red flag was brought out a third time in the final hour by Red Bull junior Ayumu Iwasa, who ground to a halt in the AlphaTauri with 40 minutes on the clock.
The test had already faced an initial 25-minute delay from its planned 9:00am local start time caused by a wait for the medical helicopter.
Carlos Sainz topped the morning running ahead of Red Bull's Sergio Perez and McLaren's Oscar Piastri with a 1m24.799s for Ferrari on softs, a time which kept him on top until sunset while he handed over the SF-23 to Charles Leclerc.
Ocon finally lowered the Spaniard's benchmark with a 1m24.393s after 110 laps, followed by McLaren's reserve driver Pato O'Ward in second with 103 laps completed.
Source: Autosport