Oxford exploit key weakness, Will Grigg conundrum plus Juan Sartori's return: Six things learned from Sunderland draw

Yet Sunderland were unable to kick-off the new League One campaign with a win, the Black Cats forced to settle for a 1-1 draw at home to Oxford United.

Here's what we learned:

Draws killed promotion hopes last season.

It all felt a little too familiar. Sunderland held at home to a side intent on getting their noses in front early and then attempting to waste as much time as possible.

Credit to Oxford, they looked well organised and well drilled and carried a threat on the counter.

They also exposed Sunderland's weakness.

Left-side a concern