Weather conditions might favour Palace at first as we will probably have to play at a slower tempo than what we like. Likely a lot of passes will go astray and the ball will not bounce good or go where we expect it. That may allow Palace to nick the ball and capitalise.
That said, if the game becomes a slog I'd expect the Palace players to tire before ours, so it might be a case of containment first half, then turning the screw and grinding the result in the second. Palace will probably sit deeper and deeper as the game goes on and their legs tire. We will maybe need a set piece wonder or a bit of individual brilliance to break them down.