The Serie A leaders Inter Milan have dropped two home points but still increased their lead over Juventus at the top of the Italian football table ahead of the pair's mouth-watering showdown in Turin next week.
Palermo looked to have breathed new life into the title race with a gritty comeback in a 2-2 draw at the San Siro, but 10-man Juventus then controversially lost 3-2 at Genoa to leave Inter 10 points clear with just seven games left.
Genoa took the lead through a strike from Thiago Motta on the edge of the area, but the referee Gianluca Rocchi had actually blown his whistle for a foul on Giandomenico Mesto just before Motta's strike.
However, Rocchi then decided to let the goal stand, infuriating the Juve players who had heard the whistle.
In a thrilling, action-packed Rome derby, Lazio claimed the honours 4-2 as AS Roma lost further ground in the chase for fourth place.
