HARRY Kane scored a first-half winner as Millwall all-but secured Championship survival with a priceless win at Portsmouth.
The Lions now sit eight points clear of the relegation zone with four games of the season to go, meaning only a dramatic turnaround would see Kenny Jackett's side go down.
Kane's 37th-minute strike, swept in from the edge of the area, proved to be the difference on a nervy evening at Fratton Park.
Goalkeeper Maik Taylor denied Kelvin Ethuhu with a fingertip save in second-half injury time as the visitors repelled a late Pompey onslaught.
But one goal was enough as Millwall picked up their second win in four days to significantly ease their relegation worries.
Survival will be mathematically confirmed if the Lions beat Leicester on Saturday and third-bottom Coventry fail to win.
Portsmouth: Ashdown, Ward, Rocha (Futacs, 45mins), Pearce (c), Rekik, Etuhu, Halford, Norris, Allan, Varney, Maguire.
Millwall: Taylor, Smith, Robinson (c), Lowry, Craig, Henry, Wright, Abdou, Barron, Keogh, Kane.