Cardiff City boss Neil Warnock has revealed that midfielder Joe Ralls is a doubt for the trip to Reading on Sunday after coming down with an unknown illness.
The midfielder was due to give a drugs test following the last-gasp win over Luton Town at the weekend, but was rushed to hospital after he started vomiting.
Speaking ahead of the trip to the Madejski, Warnock said: "Joe Ralls was one of the lads drug tested on the weekend and he couldn't give a sample.
"I left him at quarter to seven after the game and he was having a laugh and a joke and all of a sudden he took ill - started vomiting, things like that.
"He ended up in A&E overnight on a drip. It just shows you in the space of two hours.
"It just shows you, when you're as fit as these lads, the slightest thing can just knock you off sync.
"He just managed to (give a sample) in the end. I couldn't do it, with someone watching me, I don't know how they do it.
"I felt sorry for Joe. I think the drugs people were going to say it was a missed drugs test. Come on. Common sense."
It comes a week after Warnock revealed that Lee Tomlin had been suffering from gastroenteritis, although the City boss doesn't think Ralls' condition is related.
"They have taken swabs, or whatever they do, because Tomlin couldn't even come down to see our doctors because he was up at home in Leicestershire," he added.
"So we didn't see him until this week. We have been really spot on in the changing rooms and restaurants and things like that. Because the slightest bug goes around like wildfire. So we've just got to hope."
Ralls has returned to training this week, but Warnock isn't sure if the Englishman will be fit to face the Royals on Sunday, adding: "He came in yesterday and he was feeling good. But all I was trying to say is I left him at quarter to seven having a laugh and the poor lad is in hospital overnight on a blinking drip.
"It's a good job his girlfriend realised when they got home he was in a bad state and whipped him down straight away. The doc told her if he wasn't happy to take him down and she wasn't happy, so all credit to her."
Nathaniel Mendez-Laing is also a doubt for the trip east across the M4 following a thigh injury, but Tomlin is back in training following an uncomfortable week.
"It might be a bit early [for Mendez-Laing]. Tomlin trained yesterday and had a real bad week on and off the toilet," he added.
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