I think Murray is a good match up for Djokovic, especially on this surface. Djokovic has proved to be the aggressor in the two finals they've played here. Last year Murray tried to be the aggressor with zero success.
This year however, and in this tournament, Murray seems to have found the right balance between offensive/defensive tennis against the opponents he's faced. I hope he carries this over in the match against Djokovic and does not try to alter it by playing more defensive or offensive due to Djokovic' defensive capabilities. The surface seems faster than it did the times they've played here, so Murray should trust his ground game and not get desperate playing too offensive or get too complacent and wait for Djokovic' errors. He needs to find the right balance, needs to hit his forehand like he's done so far and get to the net when the opportunity presents itself in order to win imo.
Djokovic I expect to play the way he usually does against Murray, waiting for Murray to make his move and then eventually go aggressive on him if Murray doesn't go for his shots in the baseline rallies.
Wholeheartedly hoping for Murray in 4 or 5, but I'm not sure he'll get over the finishing line.