I don't know if it's because I'm English but this game seems slightly bigger for us to win than the Aussies.
For a start, we need to win the series to regain the Ashes, a drawn series is better for the Aussies. If we go 1 down, there's alot for us to do to win the Urn back.
Also we've missed more opportunities, we really should be in a stronger position. And then there's the declaration.
Finally, we've got Smith and Labuschagne out cheaply twice and if we can't win today, it going to get harder when they inevitably score big runs.
I'm not saying it's not important to the Aussies, it obviously is, but for us, you feel if we're to win the Ashes back, we really need to get the job done today.
If the Aussies lose then they can still very much still take the Ashes back home with them.