Chris Kinnear’s men could relegate a side for the second consecutive home match when third-bottom Torquay visit Crabble on Saturday.
Southport lost their National League status after losing 3-0 to Whites on 14th April and the Gulls could suffer the same fate.
Should the Devon club fail to win and Braintree, York and Guiseley all record victories, then United’s demotion to the National League South will be confirmed.
In spite of the visitor’s lowly standing on the ladder, Dover’s assistant boss Jake Leberl believes his side, who dropped to sixth after Monday’s loss at play-off rivals Aldershot Town, are in for a tough test.
He said: “Any game against a team fighting for their life is always difficult. They will do all they can within their power to stay in this league.
“They have got some dangerous players and we have got to want to win more than them on the day.”
Dover will start the game only one place and one point behind fifth-placed Aldershot, but with a game in hand on the Hampshire side.
TORQUAY’S RECENT FORM
The Gulls gave their survival bid a boost by beating fellow strugglers Braintree Town 3-1 at Plainmoor on Monday.
The visitors struck early through Manny Parry’s header, but Brett William’s fine solo run and finish levelled matters just before the interval.
The former Forest Green forward then pounced on a loose ball in the area to put the hosts ahead.
AFC Bournemouth loanee Jordan Lee made the points safe late on to keep the Gulls within touching distance of the safety zone.
27/08/16 Torquay 2-1 Dover
Ricky Miller’s free-kick was not enough to prevent Dover’s three-match winning streak coming to an end at Plainmoor.
The striker struck 15 minutes from full-time to equalise after Jamie Reid put Torquay ahead just after half-time.
But Dover’s celebrations proved to be short-lived as Dan Sparkes slotted past goalkeeper Steve Arnold just a minute later.
Tyrone Marsh’s injury time effort against his former employers struck the inside of the post, but the ball bounced away to safety much to the relief of the home support.
26/3/16 Dover 5-0 Torquay
06/10/15 Torquay 2-3 Dover
02/12/14 Dover 2-2 Torquay
Ricky Miller remains the top scorer in the National League with 36 goals.
Moses Emmanuel and Ross Lafayette both have 11.
Torquay’s leading marksman is Brett Williams with eight.
DOVER TEAM NEWS
Leberl confirmed on Thursday that Whites have a fully fit squad to pick from.
Joe Healy (calf) and James Hurst (leg) are both available for selection after being substituted during the defeat at Aldershot.
Midfielder Jim Stevenson could also be involved after being recalled from his loan spell at Southport earlier this week.
Tickets can be purchased on the day but please note that this match IS segregated.
The game starts at 3pm but if you are unable to make the trip, we will have live updates on Twitter – @DAFCLiveText – follow us and get all the news as it happens!
Coverage starts from 2pm.
The Torquay match is being sponsored by REFLEX LABELS.
All of us at Dover Athletic thank you for your support and we hope you enjoy your day with us this afternoon
MATCH BALL SPONSOR
Saturday’s match ball is being sponsored by JOHN MARTIN.
As always, we welcome John to the game and thank him for his continued and ongoing support.
SATURDAY’S OTHER NATIONAL LEAGUE FIXTURES
Lincoln City v Macclesfield Town
Boreham Wood v Gateshead
Braintree Town v Barrow
Bromley v Guiseley
Forest Green Rovers v Maidstone United
North Ferriby United v Aldershot Town
Solihull Moors v Eastleigh
Sutton United v Chester
Tranmere Rovers v Southport
Woking v York City
Wrexham v Dagenham & Redbridge
There will be a Supporters Club coach making the trip to Barrow on Saturday 29th April and it’s not too late to reserve your seat on it.
It leaves Crabble at 3am and thanks to a donation from the Supporters club, the cost is as follows:
Adults Members £20, Adult Non Members £35 and accompanied child (under 16) £10.
Please call or text Andy on 0793 4300335 to book your seat or see him in the Centre Spot on Saturday.
Please note you are now required to pay for your seat in advance by cash or by cheque or via bank transfer.
Visit http://www.dasc.co.uk/ for all the details.