Star power and a black-out highlight this weekend's Laver Cup.
Roger Federer and Tomas Berdych play-tested the all-black tennis court for the inaugural Laver Cup at O2 Arena in Prague today.
Juan Martin del Potro withdrew from this weekend's international team competition.
So how will the court look beneath the bright lights of the arena?
"We worked very hard to deliver the blackest court that's ever been delivered," managing director Steve Zacks told the media in Prague today. "We made very special paint. We tested it three times under light... We think it's gonna present beautifully."
Federer and 16-time Grand Slam champion Rafael Nadal join forces to lead a Team Europe that features Berdych, Dominic Thiem, Marin Cilic and Alexander Zverev. Hall of Famer Bjorn Borg captains Team Europe.
Del Potro, who defeated Federer at the US Open before bowing to Nadal, has withdrawn from the competition.
World captain John McEnroe has selected Frances Tiafoe to replace del Potro on his squad that includes Nick Kyrgios, Sam Querrey, Jack Sock, John Isner and Denis Shapovalov.
The three-day Laver Cup begins on Friday.
On Friday and Saturday, there will be a day and night session followed by a final single day session on Sunday.
Each day four matches are played—three singles and a doubles.
Both singles and doubles will be best of three sets with ad scoring. In the event of split sets, the third set will be a 10-point match tiebreaker.
Each player will play at least one singles match during the two days.
Photo credit: Laver Cup