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Dulwich produced a stunning final twenty minutes to turn a one goal deficit into a resounding victory.
The first half was a cagey affair with both sides showing a penchant for passing football but with little goalmouth action.
Gavin Tomlin forced a save from Stewart in the home goal and Preston Edwards twice saved well from Danny Mills. Dulwich also felt they should have been awarded a 36th minute penalty when Sanchez Ming was clipped as he burst on to a Gavin Tomlin pass.
Half Time 0-0
Whitehawk took the lead within a minute of the restart when poor control from Matt Drage saw him dispossessed and Michael West ran through to beat Preston Edwards.
It took a stunning double save from Preston Edwards to prevent Mills from doubling the lead in the 55th minute, before home keeper Thomas Stewart had to be replaced in the 65th minute by his substitute, Ross Flitney, when he was injured diving at the feet of Ashley Carew.
Nyren Clunis shot straight at Flitney after he had created space coming in from the left before Dulwich drew level in the 72nd minute. A poor clearance from Daniel Harding was cut out by Ibrahim Kargbo whose ball into the box was met by a flying header from Gavin Tomlin.
Three minutes later Dulwich took the lead, This time Green delivered a cross that Tomlin again met with his head to glance past the keeper.
In the 82nd minute Dulwich added a third. Nyren Clunis seized on a poor back pass by Chris M'Boungou before setting up Ashley Cross to fire home.
Flitney then produced a flying save to keep out a rasping effort from Ibrahim Kargbo before Dulwich added a fourth in stoppage time.
A Whitehawk effort was cleared off the line by Kenny Beaney, whose clearance fell to Natham Green. He pkayed a long ball forward to Gavin Tomlin who turned and threaded a through ball that sent substitute Ibra Sekajja clear on goal. As he tried to take the ball around the keeper he was brought down.
Ashley Carew stepped up to take the penalty and, although Flitney saved his effort, he headed home the rebound.
Final Score 1-4
Updated 14:13 - 16 Jan 2017 by Liam Hickey