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Boss Martin Hayes is continuing to look for more signings and is hoping to reintroduce some width to the Dover team.
Hayes signed Ben Hunt, defender Dean Hill and utility player Sam Cutler earlier this week, and is hoping to bolster his squad further.
"That’s the missing ingredient at the moment," said Hayes. "I want to get some pace on the flanks and get at teams."
Hayes is expecting a couple of wingers to come in on trial for their game at Dulwich this weekend.
"If they look good then we might get them on board and then we can really start planning for Woking (first game of the season)," said the Dover boss.
Hayes will continue to monitor Spurs youngster Anthony Jack and fellow trialists Luke I’Anson and Elliott Charles. All three have been invited to play this weekend.
He added: "We’ve still got three or four spaces up for grabs."
Among those not making the grade are Oliver Bartrum, Mark Corneille, Jordan Anderson and Luke Medley, who all played last weekend but have since been released.