Roger Federer will play Final Match on Friday in Laver Cup.

At the Laver Cup this weekend, Roger Federer announced that he would play just one doubles match, marking his final competitive encounter.

The 41-year-old Swiss great made his planned retirement known last week after concluding that he had not recovered enough from his most recent knee surgery to continue playing.

The 41-year-old Swiss great made his planned retirement known last week after concluding that he had not recovered enough from his most recent knee surgery to continue playing.

Beginning on Friday, Tennis Channel will broadcast every game from the Laver Cup at the O2 Arena.

Tennis has never been more popular than it was thanks to Federer and Nadal's legendary rivalry, which also helped the two men become friends. They have won 42 Grand Slam singles championships overall; Nadal, 36, has the most of any man with 22, and Federer, 41, has the most with 20.

The 20-time Grand Slam champion expressed his ambition to be in good enough shape to play in one doubles match, most likely on Friday night, at a news conference on Wednesday at London's O2 Arena.

According to aceodds.com, secondary market ticket prices for the Laver Cup shot up when Federer announced his upcoming retirement last week. Google Trends showed a 4020% increase in demand for seats.

The website stated that the cheapest seats still available from the initial sale are offered for a minimum price of £900. To put that in perspective, the most costly tickets originally cost £510. Some of the most expensive tickets are currently available for $414,000, according to Jon Wertheim of Sports Illustrated.

Federer stated he would continue to be involved in the sport in some way, but he is unsure of what form it will take.