One of Novak Djokovic's dogs, the Wimbledon Diary has discovered, is named after a Serbian-American inventor who had visions of creating a death-ray which could "melt airplane motors at a distance of 250 miles". That makes some contrast, you would have to agree, with one of Andy Murray's dogs, who is named after a Rod Stewart song, Maggie May.
Djokovic calling his dog Tesla was his tribute to the electrical engineer Nikola Tesla, who in 1940 offered to create for the American government a death-ray that would became "an invisible Chinese Wall of Defence" that would repel "any attack by an enemy air force, no matter how large".
According to a cutting from the New York Times that year, Washington never did take him up on that offer, though it has to be said that Tesla is more widely recognised and celebrated for the contributions he made to the development of the alternating-current electrical system.
Djokovic's admiration for Tesla was clear on Friday, which was the inventor's birthday, when the Wimbledon champion tweeted an image of the inventor on the front cover of Time magazine, along with the comment: "Not to forget a great man was born on this day. He never gave up on his dream."
Leading from the front
Over the course of the tennis year, Novak Djokovic and Roger Federer will probably never feel more nervous than when they walk from the locker-room to Centre Court to play Sunday's Wimbledon final. But spare a thought for the other man on your television screen walking along that corridor - for that official is responsible for ensuring that the players arrive on the grass precisely on time. It is also a time of extreme stress for him.
"The aim is to leave the locker-room two and a half minutes before the players are due on, as that's how long it takes to walk on Centre Court," Dan Bloxham told the Wimbledon Diary.
"And if we leave 30 seconds late, we can't make up that time as we can't go any quicker than the guy holding the TV camera walking down the corridor. You used to have catch-up time on that walk, but you don't any more, as you can only go at a certain speed because of the TV guy.
"For me, there's the stress before we set off on that walk of trying to get them to Centre Court on time, while the players are trying to get themselves together. I try to make it as stress-free as possible, but internally, I'll be feeling it - even though I'll be trying to look casual, I'll be looking at my watch every 30 seconds."
The boys in black and white
Almost 30 years have passed since Pat Cash won Wimbledon in his black-and-white chequered headband. But it's clear that the headband still has a hold over the public, including over some of the police officers working at the All England Club. The Wimbledon Diary spotted Cash lending his headband to the officers, who took turns at wearing it over their police helmets.