Half time in the Championship clash at the Pride Park Stadium sees Derby County and Leeds United level at 1-1.
Derby pressured Leeds from kickoff and got their reward after 15 minutes when Sammon collected the ball in the box before calmly rolling it into the back of the net.
A clever interchange between Theo Robinson and Sammon created a chance on 24 minutes, but Robinson saw his low shot saved well by Paddy Kenny.
Three minutes later, a through ball from Will Hughes played Sammon in on goal, but Tom Lees got back to make a challenge and clear.
Derby continued to dominate as Robinson's long-range shot tested Kenny, who saved well again.
The away side grabbed an equaliser against the run of play on 45 minutes when former Derby man Paul Green fired into the net after a cross was headed into his path.
