Dover must win at Forest Green Rovers on Saturday night to keep alive their hopes of playing at Wembley in the Vanarama National League Play-off Final.

Whites went down 1-0 to Rovers in Wednesday night's first leg of the semi-final infront of more than 2,000 fans and the BT Sport cameras at Crabble thanks to a nicely-taken first-half goal from substitute Brett Williams.

It means Dover need to win by at least one goal at the New Lawn to extend the tie, and need a two-goal margin to reach the final at Wembley on May 15 to face Grimsby or Braintree.

Chris Kinnear's side began brightly but Stefan Payne glanced a Ricky Modeste cross straight at keeper Steve Arnold in the early stages - it was to be their only shot on target of the night.

Dover keeper Mitch Walker was called into action twice in the opening 11 minutes at the other end, first getting down low to his left to tip a shot from the edge of the box by Kurtis Guthrie round the post.

Keanu Marsh-Brown then sent a rasping 30-yard shot towards the goal less than a minute later with Walker needing to help it over his bar.

Ricky Miller won a free-kick 25 yards out at the other end which Nicky Deverdics curled just over the angle of the near post.

The deadlock was broken on 35 minutes and it was a goal Dover won't want to watch back.

Kinnear could only turn a bouncing ball towards his own goal and Marsh-Brown harried last-man Jack Parkinson whose back-pass was sliced away by Walker, only for Marsh-Brown to gather and curl into the middle where the ball broke to Williams. The substitute picked his spot and expertly curled into the top corner from 18 yards with Walker flat-footed.

Dover's best chance of the half came three minutes before the break when a bouncing ball beat the Rovers backline but with Miller about to pull the trigger in the box he was denied by a superb recovery tackle by Charlie Clough.

A minute later Modeste burst down the right and whipped in a low cross which Payne turned towards goal from six yards only for Dale Bennett to somehow deflect over the bar.

The second half was as bitty as the first was action-packed as tension grew with so much at stake.

Deverdics skewed a 20-yard shot high and wide within four minutes of the turnaround but Dover's best chance fell to Miller just after the hour when he collected the ball 20 yards out after James Jennings had hacked down Modeste, using the referee's advantage to blast wide of the left post from the edge of the box.

The visitors looked content to sit back and protect their slender advantage but Elliott Frear lashed a volley over at the other end and saw another shot blocked by Richard Orlu after a defence-splitting pass from former West Brom £1m man Darren Carter.

Bennett and Aaran Racine went close from corners for the visitors and Payne saw a late free-kick charged down but the hosts failed to test Arnold in the second half.

Dover: Walker, Magri, Kinnear, Orlu, Modeste, Miller, Deverdics, Parkinson, Payne, Thomas (Sterling 85mins), Essam. Subs not used: Bellamy, Grimes, Marsh, Rafferty.

Rovers: Arnold, Jennings (Pipe 68mins), Clough, Bennett, Marsh-Brown, Kelly (Williams 15mins), Frear, Racine, Guthrie, Sinclair (Parkin 90mins), Carter. Subs not used: Pidgley, Moore.

Attendance: 2,071 (112 away fans).