Three points separated them after 46 rounds of League One fixtures, but just one goal is the difference as Portsmouth and Sunderland resume their play-off semi-final on Thursday night.
Sunderland, who finished fifth in the regular season table, lead 1-0 thanks to Chris Maguire's 62nd-minute strike at the Stadium of Light on Saturday.
But Portsmouth only lost four of their 23 home games this season so will fancy their chances of turning the tie around on the South Coast.
A place at Wembley against either Charlton or Doncaster is at stake and kick-off is at 7.