Portsmouth took another big step towards the League One title with a vital 1-0 victory at promotion rivals Peterborough.

Australian striker Kusini Yengi climbed off the bench to grab the only goal in the 77th minute to send an army of 4,000 Pompey fans wild.

Yengi slammed his seventh of the season past Posh keeper Jed Steer to complete a ruthless breakaway after being picked out by fellow substitute Gavin Whyte’s pass.

And that was enough to extend the table-toppers’ unbeaten run to 12 games while bringing Posh’s five-match winning streak to an end.

Captain Harrison Burrows was inches away from giving Posh a first-half lead when steering a low shot past the far post.

Top-scorer Ephron Mason-Clark came even closer to breaking the deadlock when blasting against the bar.

That was soon followed by the best Pompey opportunity of the opening period as Colby Bishop headed a Marlon Pack free-kick straight at Steer.

Malik Mothersille saw a volley fly across the face of goal as Posh started the second half well, but it was Pompey who eventually made the breakthrough to move nine points clear of third place and closer to a Championship return.