Derby led twice, but Pompey levelled twice to take a point. The home side maintained their five point lead at the top, while Derby are four points ahead of third-placed Bolton Wanderers who have one game in hand and eight points clear of Posh who have two games in hand.
Elsewhere Wycombe Wanderers, who tackle Posh in the Bristol Street Motors Trophy Final at Wembley on Sunday, have suffered an injury scare to a key player. Midfielder Josh Scowen went off with a knock during a 0-0 Easter Monday draw at Blackpool.
