Leeds were denied a penalty in the opening exchanges when Dan James was felled by Matt Ritchie who volleyed the back of the winger's leg as he looked to clear in a crowded box. Referee Robert Jones appeared to think about it but waved play on, much to the fury of United's players.
A fine double save then denied Daniel Farke’s Whites, Nicolas Schmid keeping out Manor Solomon's firm low shot in a tightly packed box before also thwarting Joel Piroe's attempt on the follow up.
An absolutely glorious Leeds chance was then squandered early in the second half as Piroe skied a shot over the bar from close range after being perfectly teed up by Solomon’s cutback.
But Pompey remained a threat at the other end themselves and John Mousinho’s side bagged what proved the only goal of the game in the 61st minute as Colby Bishop was played in down the left channel before advancing on and beating Illan Meslier with a neat finish.
Even then, more golden Leeds chances were wasted, Junior Firpo unable to beat Schmid when one on one and a Firpo header crashing back off the bar. One final chance in the 96th minute then led to one final excellent Schimd save to tip a Sam Byram header over the bar.
Graham Smyth, the YEP’s chief football writer, hands out the scores from a defeat which has left Leeds only top of the division on goal difference.

7. Ilia Gruev
4 - In the team to give the midfield Leeds and solidity but he never gave them control. Couldn't bring the necessary physicality. Photo: Zac Goodwin

8. Manor Solomon
5 - Came close with a clever shot through a crowd but found himself doubled up on. Photo: Alex Davidson

9. Dan James
4 - A couple of promising moments but couldn't get the cross away for a clean-through Solomon early enough. No magic moments. Photo: George Wood

10. Brenden Aaronson
3 - Started brightly enough with a nice dummy and a cut-back for Solomon but then it became a physical battle and one he lost. He became anonymous. Photo: Ben Roberts Photo

11. Joel Piroe
3 - In the right place to score, twice, but fluffed his lines. Unable to make himself a factor for most of the contest. Photo: Zac Goodwin

12. Joe Rothwell (sub)
5 - One decent corner delivery but the quality wasn't there otherwise. Photo: Zac Goodwin