US Open: Can Andy Murray win his first Grand Slam
So, as they say in school, what comes next in this sequence? Novak Djokovic, Rafael Nadal, Roger Federer...
And what about this one? Victoria Azarenka, Maria Sharapova, Serena Williams...
Six different champions from the six Grand Slam singles events played so far in 2012.
It's the first time that's happened since 2005 when the names were Safin, Nadal, Federer; Serena, Henin and Venus.
So who's going to win in New York City, at the biggest and brashest of the four major events, the US Open?
Andy Murray will be looking to use his Olympic success to inspire US Open glory. Photo: Getty
The only certainty is that it won't be Nadal winning a 12th Grand Slam title. He's in Majorca, enjoying the sunshine, according to his spokesman, with no firm comeback date in the diary after the latest inflammation of his left knee.
Although unconnected to the long-term tendinitis issue, it sounds as though it's going to be touch-and-go whether Rafa makes it back for the Davis Cup semi-final between Spain and USA in Gijon. Everyone wishes him well.
So the big four, for once, is a big three and that made the men's draw a little more interesting than usual. With Federer up top, the fresh-faced number one seed, and Djokovic down the bottom, the defending champion and number two, onto which side would Andy Murray fall?
The answer was Federer's. Djokovic will be delighted about that. And, actually, I don't think Murray will be too unhappy either. After the thrashing of Federer at the Olympics, he'll be confident of winning again in the semi-final should they meet. And it avoids potential chat of "will it be a fourth Grand Slam final loss to Federer" had they been in opposite halves and met in the Championship match.
But there are tough tests before then for the Gold medallist from the London Games. Possibly Milos Raonic, the big-hitting, improving Canadian, in round four ahead of a last eight meeting with Jo Wilfried Tsonga, the 5th seed. Kei Nishikori, the Japanese 17th seed is also in that third quarter of the draw and Flushing Meadows is the most likely scene for his major breakthrough, whenever that comes (and better judges than me insist it will).
Over in Djokovic's half we find the two first round matches which stand out from the men's draw; Juan Martin Del Potro (7), a potential quarter-final opponent for the man from Serbia, plays compatriot David Nalbandian, who may be getting on but remains one of the most talented floaters out there. That match-up will excite those who look for a bit of ruction, fictional or otherwise. The story goes that the pair had to be separated in the locker room after the 2008 Davis Cup final as accusations flew in both directions. They haven't played since.
And what about Tommy Haas, the 34-year old "newcomer" of the year? Three months ago, he was playing qualifiers for the French Open, ranked outside the top 100 and fighting back from the latest of seven surgeries. Now he's seeded 21 in New York after an amazing summer of success. He faces Ernests Gulbis, the flashy Latvian who upset Tomas Berdych on day one of Wimbledon, you may remember, in the Flushing first round.
Haas reports the courts are playing pretty swiftly, according to his friend and mentor Nick Bolletieri, and he's been flying in Florida practice. One to watch, no doubt.
The WTA this week unveiled the latest stage of it's "Strong is Beautiful" advertising campaign, featuring a parade of high-profile women's tennis fans (the majority American) alongside the stars of the tour.
Some, I'm sure, will care what Donald Trump thinks, but the publicity is all free publicity right now, thanks the ongoing Serena Williams story and those who talk and write about it.
Already one of the greatest female athletes of all time, recent evidence suggests Williams is improving as a player into her thirties and justifiably is the favourite for the women's title despite her number four seeding.
She won Wimbledon and Olympic Gold thanks to a devastating display of serving, emphasising the widely held belief that she owns the finest serve ever seen in the women's game, but, more than that, she showed a wider, cuter, more tactically aware style of play. Suddenly she isn't trying to whack the ball at every opportunity.
What a whack it can be, but Serena's great improvement - particularly during the Olympics - was knowing when to hold back, build the point and expose her opponent. French coaching consultant Patrick Mourotoglou has had an obvious influence.
If she keeps it up and avoids the sort of controversy which has stalked her around New York for the past few years, she can add the US Open to that list of gongs from the the glorious summer of 2012.
Rivals will include top seed Azarenka and 3rd seed Sharapova, both in the same half, Canada champion Petra Kvitova and in-form Li Na. The Chinese 9th seed has played a superb hard-court summer so far, including the title in Cincinnati, and with Carol Rodriguez, Justine Henin's former coach, lending a hand, she could be the best of the outside picks to challenge Serena.
That section of the women's championship also features three-time winner Kim Clijsters and, despite her proximity to Brits Laura Robson and Heather Watson in the draw, it must be hoped that she has a fine run to end her amazing career on a high.
A career of two parts with Grand Slam titles either side of having her first child. She retires for good, she maintains, after the US Open and will be hugely missed. The image of Jada toddling across the stadium court to greet Mum and the trophy, well past her bed time after the final of 2010, remains one of the most memorable from recent US Opens.
Images last year were not so fun. Water seeping up through court surfaces, referees without a clue, players leading ball boys to alternative courts, rain, rain and more rain. Let's hope - just for a treat - we have a trouble-free US Open.
And so we return to those sequences I mentioned. Who comes next? Del Potro and Li Na? Just to give us eight different champions from the year? It's possible, but I'd rather go with Murray and Serena.