Mercedes remains Formula 1's undoubted dominant force, but could its baffling performance slump in qualifying at last week's Belgian Grand Prix represent a slight chink in what otherwise seems like impenetrable armour - a small crumb of comfort on which its rivals might seize in Italy?
Mercedes brought a decent engine upgrade to Spa and Nico Rosberg trounced his F1 opposition in Q2 using the soft compound Pirelli tyre, quicker than Red Bull's Max Verstappen could go on the super-soft, which was estimated to be slightly north of a second faster than its yellow-banded cousin. Perfectly predictable on a circuit that suits Mercedes so well.
But when Rosberg bolted on the super-softs for Q3 he found less than a quarter of a second - that's at least 75% less of an improvement than expected. Verstappen ended up only 0.149s slower than F1's fastest car; Ferrari's Kimi Raikkonen felt sure he'd have snatched pole but for a mistake at the final corner.