The home team opened brightly showing their intent early on when Sid Adams and Reece Edwards both hit the post. This was swiftly followed with Little Common having to clear a Haven effort off their goal line.
On 18 minutes captain Craig Avens (pictured) opened the scoring for Peacehaven when he bent the ball into the top corner after beating a Little Common player.
And just a minute later it could have been two when Adams again hit the woodwork.
With just 23 minutes played Avens was at it again. After great work from Adams down the left he found Mitch Ford who set up Avens who bent it into the bottom corner to make it 2-0.
Just five minutes later, Edwards again hit the woodwork. But it was Little Common who scored next when on 25 minutes and against the run of play Tom Benford pulled one back for the visitors.
On 39 minutes, Haven restored their two goal advantage when Jem Tekin-Fisher showed great pace and buried the ball in the bottom corner.
But straight away Little Common reduced the arrears when after good work William Spice scored to make it 3-2. And two minutes later the visitors were level through Nick Richardson.
It only took two minutes of the second half before Peacehaven restored their lead. A great pass from Ben Dinnage found Tekin-Fisher who dispatched a great finish into the far corner for his second of the match.
But the visitors were not finished and Richardson got his second of the night to make the final score 4-4.
The Under 21s are next in action on Monday April 16 when they face Pagham U21s at home in the semi-final of the Under 21s County Cup.
Updated 12:53 - 10 Apr 2018 by Pitchside View