A 1m38.130s for Leclerc now puts him top of the pile, 0.252s ahead of Sainz.
Leclerc, Sainz, Verstappen, Perez, Hulkenberg, Norris, Gasly, Stroll, Alonso and Zhou.
A 1m38.382s for Sainz on the softs put him top of the timesheets.
The two Ferraris are running on the softs, allowing Leclerc to set the fourth-best time.
The fire at Turn 7 has been cleared so the session is underway again.
"There is a fire on the grass at Turn 7," Ocon reports.
Verstappen extends his advantage to 0.6s now over Perez as he sets a 1m38.498s.
Verstappen, Perez, Hulkenberg, Alonso, Ocon, Bottas, Stroll, Zhou, Magnussen and Hamilton.
On the hards, Alonso gets within a tenth of Verstappen's top time. Ocon completes the top three for Alpine.
He storms to P1 with a 1m39.497s, 1.1s ahead of Gasly.
Gasly takes to the top on the softs with a 1m40.679s, 0.021s ahead of Bottas.
The only 60-minute practice session of the weekend is now underway.
Here's some key information ahead of this weekend in Shanghai!
Hello everyone! Thanks for joining us this early for this weekend's Chinese Grand Prix.
It will be the first time F1 races in Shanghai since 2019 - and this time, it's a sprint weekend.