A ball that clearly landed long in a match at Centre Court wasn’t called out Sunday because the electronic system that replaced line judges at Wimbledon this year was shut off.

Wimbledon is using a high-tech camera system in place of line judges for the first time this year. On Sunday, something went badly wrong with it.

It might just be the best deal in all of major professional sports. Tennis fans can get a chance to watch stars such as Carlos Alcaraz compete on Centre Court at Wimbledon by forking over just 15 pounds — about $20 at the current exchange rate.