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Dartford defender Matt Jones and striker Jacob Erskine have joined midfielder Jon Wallis on the Princes Park treatment table.
Former Gillingham and Dover man Wallis fell awkwardly before limping off against Sutton last week and missed Saturday’s 1-0 defeat at Dorchester.
Jones (knee) and Erskine (ankle) were due to be assessed at training this week after both were injured in Dorset.
Dartford face struggling Maidenhead at Princes Park on Saturday before playing their game in hand on the rest of the play-off chasers on Tuesday at Eastbourne Borough.
Darts boss Tony Burman said: "Maidenhead are down there fighting for their lives and so will come and make it tough."