Horsham hope to give John Kirby a lift tonight with their second victory of the season.
Kirby, 29, has had two brain scans and is being kept under observation at East Surrey Hospital after collapsing last week.
He has made almost 300 appearances for Hornets after joining from local football in 1998.
Boss John Maggs said: "John is a lovely bloke and a superb player, so we all wish him a quick recovery. We will not know how things stand until we get the results of tests later this week."
Maggs is sweating on the fitness of striker Gary Charman ahead of tonight's trip to Tooting and Mitcham.
Charman, top scorer last season, suffered a knee injury in the 3-2 defeat against AFC Wimbledon on Saturday.
Maggs will give Germain Amanuel his first start since returning to the club in the summer if Charman is not fit.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article