Alex McLeish reckons there is more to come from Fabian Delph after he recovered from the virus that kept him out of the West Brom game.
The 21-year-old was out injured for eight months with a cruciate knee ligament injury but has returned this term full of vigour.
He contracted a bug on the eve of the Midlands derby but trained in an open session on Monday and gave his manager every indication he is ready to resume his place in the team.
McLeish told the club's official website: "He was out of the West Brom game with a virus.
"We got early indications the morning before that he would not make it. The doctor visited him at 1am and he was vomiting.
"He must have been a bit distressed. He would have made the 18 for the game."
Delph has shown no ill effects of the injury that kept him out for so long and is beginning to demonstrate the type of form that saw him feted as a star of the future at Leeds.
This is a real bonus for McLeish, who believes there is still much more to come from the Bradford-born midfielder.
"We have pushed Fabian back into the limelight after being out for a long time injury-wise and he has played nine games in a row and he should be proud of that," he added.
"There is so much to come from him too. I know he is a guy who cares and studies his game, looks over it again with the IT guy.
"He is someone who wants to be as good as he can be."