Andy Murray will take on 16-year-old Borna Coric in Great Britain's opening Davis Cup World Group play off rubber against Croatia.
The teenager followed in Murray's footsteps by winning the US Open junior title last Saturday at Flushing Meadows and has been named as Croatia's number two by captain Zeljko Karajan with Marin Cilic and number three Ivo Karlovic unavailable.
Dan Evans will take on Croatia's selected number one Ivan Dodig after being picked by Great Britain captain Leon Smith ahead of James Ward.
Coric, who won three senior titles on the Futures circuit before his US success last week, and was quizzed on the prospect of taking on the British number one to take place on Friday.
"I don't think I can win - only if he injures himself," Coric was quoted as saying by BBC Sport earlier this week.
"I haven't played a five set match, so if I'm playing it's going to be tough.
"It's unbelievable to play for me country," said Coric, who regularly trains in London with his British coach Ryan Jones.
"When I was eight or nine we won the Davis Cup - I was watching on the TV and hoping one day I'm going to play there.
"It's my first Davis Cup, so I'm there just to be there. If he says 'you play' I will play. If he says 'just bring the water on the court', I will just bring the water on the court."
The 16-year-old will be doing a lot more than fetching water bottles when he takes on Murray, who will be making his first appearance since relinquishing his US Open title after crashing out in the quarter final stages of the year's final major after a straight sets loss to Stanislas Wawrinka.
Murray, who is playing in his first Davis Cup tie for two years, will also play in the doubles rubber with Colin Fleming which will see the Scot scheduled to play on all three days.