Guernsey FC face a "really tough task" to make the Isthmian League Division One South play-offs after their 2-0 loss at home by Faversham Town.
Second-half goals from Dean Grant and Wayne Wilson consigned Guernsey to their second straight defeat.
The Green Lions had previously taken 27 points from a possible 36 to get back in contention after a poor run of form.
"There's 27 points to play for, but it makes it a really tough task," manager Tony Vance said of the play-offs.
"The teams in these play-off positions are in pole position and have been all season," he added to BBC Guernsey.
|Guernsey FC's recent form|
|13 December: W v Whitstable Town 4-3 (a)||17 December: L v Worthing 4-3 (a)|
|20 December: W v Sittingbourne 2-0 (a)||27 December: W v Redhill 3-1 (h)|
|10 January: W v Corinthian Casuals 3-0 (h)||17 January: W v Walton and Hersham 3-0 (a)|
|24 January: W v Tooting and Mitcham United 3-2 (h)||7 February: L v 3-0 to Burgess Hill Town (a)|
|14 February: W v Horsham 2-1 (h)||21 February: W v Carshalton Athletic 2-0 (h)|
|28 February: W v Hastings United 1-0 (h)||3 March: L v 2-0 to Three Bridges (a)|
|7 March: L v Faversham Town 2-0 (h)|
Guernsey made the play-offs last season, losing out in the semi-finals, but a combination of injuries to key players and a loss of form between September and Christmas has seen the Green Lions in mid-table for much of the campaign.
They are currently ninth in the division, eight points off fifth-placed Whyteleafe, who sit in the final play-off spot.