Lewes are looking to scupper Havant's outside chance of promotion on Sunday.
The Hampshire side could still go up and will start as favourites against a Lewes side already assured of National League safety.
However, Lewes skipper Will Champness wants a good result ahead of their Sussex Cup semi-final with Chichester the following week.
Champness said: "We don't want to get in the habit of playing badly because we have the semi-final so I am looking for a decent performance.
"Havant could still go up. We can't do anything ourselves but we could ruin their season. They are a local side. It will be better if they are in our league next season than having to go to somewhere like Manchester or Birmingham."
Lewes welcome back Ryan Ibbotson and Matt Lloyd.
East Grinstead will make a late decision on the fitness of defender Paul Turk before Sunday's visit to Blueharts.
In the Kent/Sussex Regional League, champions Brighton will be depleted as they complete their season at Folkestone.
Skipper Carlo Missirian and Paul Watson are missing as they are joint managers of the Sussex under-15 girls team competing in the national championships. Pete Smales and Luke Williams are also unavailable.
Horsham's Mark Newsom is back for their game at home to Gillingham Anchorians James Mackay captains Eastbourne for the last time in league action as they visit South Saxons in Kent/Sussex division one. Mackay is stepping down after five years as skipper.
Squads, East Grinstead: Dakin, Harms, Turk, Male, Akande, Eiden, Sullivan, Pine, King, B. Payne, R. Payne, Howarth, Holland, Pattison, Keen , Pizzey, Coote.
Lewes: Wilkinson, Bone, Standing, Bettesworth, Mulany, Champness, Ibbotson, Garner, Poulsen, Hooker, van Tromp, Achterbergh, Wright, Pike, Stillman, Lloyd.
Chichester: Jones, Pywell, Jaeger, Dunn, Dougal, Lane-Smith, Pendle, Turner, S. Beere, Lock, Savory, A. Brown, Robinson, Lerwill, Veltom.
Brighton: Ashdown, Baker, Turnbull, Lendrum, Warrinder, Brown, Carolan, Delea, Attala, Cooke, Howarth, Acott.
Horsham: Burlinson, Ford, Crossley, Hartley, Sims, Cohen, Lowe, Perkins, Blakesley, Down, White, Donaldson, Newsom.
Mid Sussex: Purdie, Green, Holmes, Firmin, Elliott, Middleton, Hobden, Booth, Humphreys, Hurle, Goodwin, Newton.
Worthing: Godsmark, Martin, Godber, Jarrett-Kerr, Massie, Beales, Minchell, Ansell, Duncan, Edmondson, Ramiz, Lock, Fuller.
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