Daniel Farke praised James Trafford's potential following a solid display in Leeds' 0-0 draw against Sunderland.
The 24-year-old goalkeeper twice denied Black Cats striker Brian Brobbey in the first half and was called into action again after the break to stop Nilson Angulo.
Trafford joined Leeds from Manchester City over the summer for a reported fee of £40 million ($53m) plus bonuses and Farke was impressed with his display as the Yorkshire side secured a clean sheet.
"I wouldn't say there was an unbelievable, world class save, but several good saves and he has shown also today why we were so desperate to sign him," Farke said.
"Yes, his natural belief and skills, his aura and confidence also inspires the players in front of him but to be honest, I was expecting a performance like this from him, this is why we spent some money on him.
"I expect also a goalkeeper for Leeds on this level in a difficult away game to be the here and there. I don't expect anything less than the performance that he showed today.
"Of course, he's for me the most promising young goalkeeper in the UK and he has all potential, more or less, to be also one day England's No. 1.
"He shows this capability for us day in, week in, week out, but he has to keep going and show this with consistency. Again, I expect performances like this because he has potential to do this and nevertheless, we are all happy to have him."
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