Back to the upcoming match - we're going big with this today...

Does Kyle Edmund have the talent to win a Grand Slam?

This is what Andy Murray said at Queen's recently: "The forehand is a big shot. That’s his main weapon. 

"But the serve isn’t slow, either. If you want to get to the top of the game, you need to have weapons, and he has them."

What do you think?

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Image source, BBC Sport

Victory for GB would see them face Argentina or Italy in the semi-final. 

Argentina lead 2-1 after the second day in Pesaro, Italy, thanks to a five-set victory for Juan Martin Del Potro and Guido Pella over Fabio Fognini and Paolo Lorenzi. 

Elsewhere, France - featuring Wimbledon doubles champions Pierre-Hugues Herbert and Nicolas Mahut, as well as singles quarter-finalists Lucas Pouille and Jo-Wilfried Tsonga - lead the Czech Republic 2-1. 

The US lead Croatia 2-1 and Jim Courier's side looked on course for victory yesterday before a shock doubles defeat for Bob and Mike Bryan.

Image source, Getty Images and Reuters

Here we go.

Victory for Yorkshire's 21-year-old Kyle Edmund would take defending Davis Cup champions Great Britain into the last four of the competition.

Will he do to opponent Dusan Lajovic what he did to Janko Tipsarevic in the pouring rain on Friday? Brush him aside in three sets?

Remember this young swashbuckling player has been leading the team without Wimbledon champ Andy Murray, who is in Belgrade to provide support

Lajovic, 26, also swept aside his opening opponent James Ward - watch out for his Federer-esque backhand.

It's the best versus the best.

Ready? Fight!