Max Verstappen set the fastest time on Saturday in the third and final free practice for the Bahrain Grand Prix.
The Red Bull Racing driver was ahead of both Mercedes.
Verstappen came in the final phase on the soft tire to 1.28.355.
At the same compound, Lewis Hamilton (1.28.618) and Valtteri Bottas (1.28.721) were the only other drivers to go below 1.29.
Earlier in practice, Verstappen had also recorded the fastest time, although he did so with a missing rear wing, which was flapping when he used DRS.
The problem was resolved, although the technicians continued to look at it until the end.
The fastest time is a boost for Verstappen, although the results of the final training say relatively little.
The conditions are different from qualifying and the race, which are run under artificial light and considerably lower temperatures.
In contrast to the first two practices, the drivers did not test with the tires that manufacturer Pirelli developed for last year.
There has been considerable criticism of those tires.
Qualifying for the Bahrain Grand Prix starts on Saturday at 3 p.m.
The race starts on Sunday at 3.10 p.m.
Top 10 third training Bahrain
1. Max Verstappen - 1,28,355
2. Lewis Hamilton - 1,286,618
3. Valtteri Bottas - 1,28,721
4. Alexander Albon - 1,29,018
Carlos Sainz - 1.29,455
6. Pierre Gasly - 1,29,472
7. Lando Norris - 1,29,567
8. Daniil Kvyat - 1,29,585
9. Lance Stroll - 1,29,660
10. Sergio Pérez - 1,29,672
See also: Five questions about Bahrain GP: 'Verstappen only has a chance for the first weekend'