Graphic: The F1 track for Austrian Grand Prix
Formula One returns to Europe after a brief trip across the Atlantic to the Red Bull Ring in Spielberg for the Austrian Grand Prix this weekend.
The race returned to the F1 calendar last year for the first time since 2003, with Nico Rosberg top of the podium with Mercedes in that outing.
In addition to the main race, the circuit will also host a two-day test on the following Tuesday and Wednesday, before the drivers leave town.
And Williams driver Felipe Massa rates the big upgrade planned for his team as a crucial opportunity to increase the pressure on rivals Ferrari.
Valtteri Bottas scored Williams's first podium of 2015 of third in the Canadian Grand Prix earlier this month, beating both Ferraris.
That's despite the Scuderia souping up both vehicles, while Massa rose through from 15th to sixth despite a power loss in qualifying.
With the prospect of Williams's biggest upgrade of the season, Massa has sent out a rallying call to close the 76-point gap on Ferrari.
"I think the team is going in a good line. It's an important moment for us - we have a good track for us in Austria, with some upgrades.
"So I think it's an important moment for us to put some pressure on Ferrari.
"I don't know when Mercedes will put some upgrades on the engine. Maybe when they do, we can get stronger in that area."
