So much has been made about "the double" -- in which drivers have raced in the Indianapolis 500 in the early afternoon and then flew to Charlotte Motor Speedway to compete in that evening's Coca-Cola 600, the longest race on the NASCAR Cup circuit.

The last driver to do the double was Kurt Busch in 2014. Others who have done it in the past include John Andretti, Tony Stewart, and Robby Gordon. In order to make it work, Indianapolis Motor Speedway had to start the 500 a little earlier than desirable, and when it was moved to later in the day, that effectively killed the strategy. 

But drivers have nothing on race fans when it comes to this Sunday. No driver will be doing the double, but a lot of fans will be doing the "triple," namely, tuning in to watch the Monaco Grand Prix in F1 in the morning, the Indy 500 in the afternoon, and the Coke 600 in the evening.

Really passionate fans will also be streaming the Super Stock Triple Threat Weekend LIVE on FloRacing. 

While the Monaco event is a prestigious race in an equally prestigious venue in and of itself, it has nothing on the 500 and 600 for American race fans.

While enjoying BBQ and family get-togethers huddled around the TV -- or perhaps even in attendance at either Indianapolis or Charlotte -- fans will have plenty of things to not only watch but also to mull over in terms of a multitude of storylines at each event.

FloRacing breaks down the top five storylines for both the Indianapolis 500 and Coca-Cola 600:

Indy 500

ALONSOMANIA IS REAL: Will former two-time Formula 1 champion Fernando Alonso, in his first career race on an oval track, show up the IndyCar regulars in the biggest race in the world? Win or lose, Alonso has brought worldwide interest and attention to both Indianapolis and the Verizon IndyCar Series.

CAN HELIO CASTRONEVES FINALLY EARN HIS FOURTH INDY 500 VICTORY?: If so, it would put him in perhaps the rarest club in motorsports: joining A.J. Foyt, Rick Mears, and Al Unser as the only four-time winners of the Greatest Spectacle In Racing. Castroneves' previous Indy 500 wins came in 2001, 2002, and 2009.

SOPHOMORE SHOCKER?: American driver Alexander Rossi gave up a chance to race in Formula One and cast his future with the Verizon IndyCar Series. It was a quite prudent decision, as Rossi -- the IndyCar rookie -- would shock the world by winning last year's 100th running of the Indianapolis 500. Can he do it again? He has a good chance: He's starting on the outside of the front row.

CANADIAN COMEBACK: Returning from a near-fatal crash in practice for the 2015 Indy 500, Canadian driver James Hinchcliffe started on the pole position in last year's 500 and feels he has some unfinished business coming into Sunday's race. Can he join fellow countryman Jacques Villeneuve (1995) as the only Canadians to ever win the 500?

FAMILY HISTORY: Third-generation racer Marco Andretti has had arguably his best month of May ever at Indianapolis Motor Speedway, including having led several practices. Could Marco join grandfather Mario Andretti (won in 1969) as the only grandfather-grandson winners in 500 history?

Coca-Cola 600

TRUEX TROMPS THE FIELD: Martin Truex Jr. made NASCAR history in last year's Coca-Cola 600 by dominating the event and crushing the opposition by leading 392 of 400 laps en route to his win in NASCAR's longest and most grueling race. Can Truex repeat Sunday?

THE LAST SHALL BE FIRST: Current NASCAR Cup points leader Kyle Larson failed to make a qualifying attempt for the 600 but will still make the race via owner points. Will Larson, who will start at the back of the 39-car field, be able to roar his way back to the front of the pack? One thing's for sure: He'll have plenty of time to accomplish that, given the race is 400 laps and 600 miles and is now going to be run in four segments.

WHAT HAVE YOU DONE FOR ME LATELY: Kyle Busch won last Saturday's NASCAR All-Star Race, his first Cup-level triumph at Charlotte Motor Speedway. BUT… he comes into Sunday's race still not having won a "points-paying" Cup race (the All-Star Race had a $1 million payday for the winner, but NASCAR Cup points are not awarded) at the 1.5-mile track. Will Busch be able to sweep the so-called 10 Days of Thunder at Charlotte with a win Sunday?

EVERYONE LOVES A FIRST TIME WINNER: Jamie McMurray and several other drivers earned their first career NASCAR Cup wins at Charlotte. Several drivers will be in the spotlight to see if they can finally break through with their first career Cup win Sunday, including Chase Elliott, son of NASCAR Hall of Famer Bill Elliott, and Ryan Blaney, son of sprint car legend Dave Blaney.

JUNIOR MAGIC: Dale Earnhardt Jr. will have his second-to-last chance to finally win his first Cup race at Charlotte. It's hard to believe he's raced there for 16 years and still hasn't won a Cup race. With retirement on the horizon at season's end, not to mention the terrible season he's had so far, can Earnhardt reach back for some of his past magic in the series to finally say he's a Charlotte Cup winner on Sunday?

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