IN-FORM Town skipper Jon Worthington is a major worry for Saturday's home clash with Colchester.
And boss Peter Jackson is also having to wrap goalkeepers Paul Rachubka and Phil Senior in cotton wool ahead of the crucial League I showdown.
Midfielder Worthington, in fine form during a run of victories which has sparked hopes of making the play-offs, picked up a knee injury during training.
He is now under treatment from physio Lee Martin, who is also tending to Rachubka (back) and Senior (leg) alongside longer term absentees Tony Carss (groin) and Steve Yates (calf).
And Jackson won't know until later this week just what Worthy's chances of making the big Galpharm clash are.
"Jon tweaked the outside ligaments and went straight off the training ground and in for treatment," reported Jackson, who hopes to equal last season's run of six straight wins between Boxing Day and January 25.
"It's a worry because Jon, who has a key role as first-team skipper, has been right back to his best form recently, and in our last three matches in particular, has been really outstanding."
No-nonsense competitor Worthington, who will be 22 on Saturday, missed the first match of Town's winning run, the 4-3 home success over Stockport, because he was completing a two-match suspension after accumulating 10 bookings.
But he returned for the 1-0 Good Friday victory up at Hartlepool, and has since contributed to the 1-0 home win over Sheffield Wednesday, 2-1 victory at Peterborough and Saturday's 3-1 Galpharm derby triumph over Doncaster.
That has taken his season's appearance tally to 42 and his career total to 111.
Rachubka was absent from the Peterborough match because of his back strain and had to pass a late fitness test to face Doncaster, when Senior was on the bench despite suffering a knock to the leg during training.
Senior was being kept out of this afternoon's important Pontin's Holidays League Division I East clash with Reserve title rivals Doncaster at the Galpharm (2.00) as a precaution, with Jacob Giles called in.
Club captain Rob Edwards, whose release at the end of the season was announced yesterday, was also set to be involved.
Victory today and away to leaders Scunthorpe on April 27 would earn Town's second string the title and promotion.