Single-file racing in NASCAR's Daytona week so far has led to concerns about the spectacle in Sunday's Cup Series season-opening 500.
Last weekend's non-championship Clash race, Thursday night's Duel qualifying races and Saturday's Xfinity Series opener were all characterised by long periods of cars running single-file and protecting the high line.
The Daytona 500 is an anomaly in the revised 2019 Cup rules package - featuring horsepower reductions and aerodynamic changes to try to stabilise the cars and improve the racing - as it is the only time the restrictor plate system will be used.
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Retired driver Dale Earnhardt Jr, whose JR Motorsports team won the Xfinity race with Michael Annett, admitted he was perturbed.
"I don't know what's going on with the high line becoming just so clearly dominant," he said.
"It doesn't seem like it's entirely by choice that they all ride up there. It's by necessity.
"We're going to have a completely different package when we go to Talladega so it could be a non-issue, but the Xfinity cars and the Cup cars are not entirely similar and they both reacted the same way and did the same thing and raced the same way.
"The drag numbers aren't the same, the power isn't the same, the drivers aren't the same, but they looked the same and ran the same and had the same similar race that we've seen all week."
Many drivers have cited the fact that passing is easiest on the outside, so the high line is being monopolised because they do not want rivals to get a run to their right.
Roush Fenway driver Ricky Stenhouse Jr spent "the last 25 laps trying to figure out exactly what I was going to do" in the first Duel as he chased leader Kevin Harvick, but "nothing really materialised" in terms of passing opportunities.
"Everybody has just learned that if we keep cars away from our right rear quarter panel, we can kind of defend our position," said Stenhouse after finishing second.
"You get the top five or six that want to run single file, then the rest of the cars that want to race. They can't because we're so fast in the top lane."
The second Duel did feature a late pass for the lead, as Clint Bowyer was overcome by Joey Logano - who had drafting help from Penske team-mate Ryan Blaney - in the closing stages.
Bowyer said the fact the leaders could run so much quicker in a single file train was hard to ignore.
"Once those cars get single file like that, just look at the lap times, that tells the story," he said.
"Those lap times pick up a second, literally a second. The longer that chain got the faster I went up front.
"One time the chain must have got longer because we picked up three tenths like 'boom'.
"As soon as the #9 car [Chase Elliott] started getting antsy down there [on the lower line], we slowed down. As soon as they got back in line, I could see our lap times picked back up.
"You can't unlearn things that we've learned. Will it go back to three-wide, four-wide, chaotic Daytona like it always is? Probably at some point."
Stenhouse also felt that the quiet qualifying races were a case of "just learning over the years that the racing has come to this - just trying to get to the end, nobody wants to crash cars".
Leading team bosses agreed that the cagey week so far was partly because of a desire to conserve machinery for the 500 itself and due to the smaller fields of the Clash and Duels.
Roger Penske said: "We have to put it in context. The 125s [Duels], quite honestly, you have your 500 car, you have less of a field, so there's less cars out there to manoeuvre with or draft.
"The racing will be certainly better on race day. Cars are trying to get up to the front and draft [in the Duels].
"From a show perspective, I think you're going to have a blanket over the cars that can win [in the 500]."
Stewart-Haas Racing co-owner Tony Stewart agreed.
"The thing about the qualifying races is the majority of the field is locked in anyway," he said.
"The worst thing to do is put yourself in a bad position and have to bring a back-up car.
"You don't want to do anything to jeopardise that car that you qualified for the race. Guys are a lot more careful.
"But we saw guys like Chase Elliott, Daniel Suarez, that were trying moves by themselves. That's something you typically don't see a lot of, where guys can move and pass by themselves.
"I thought that was encouraging to see you're not having to rely necessarily on a whole pack of cars to help you move through the field.
"Like Roger said, the more cars you get out there, the more the pack racing gets a lot better and bigger.
"Qualifying races typically aren't as exciting from that standpoint, but it's because guys are really trying to take care of their equipment.
"The goal at the end of the day is to win the Daytona 500."
Daytona 500 starting grid
|1||William Byron||Hendrick Motorsports||Chevrolet|
|2||Alex Bowman||Hendrick Motorsports||Chevrolet|
|3||Kevin Harvick||Stewart-Haas Racing||Ford|
|4||Joey Logano||Team Penske||Ford|
|5||Ricky Stenhouse Jr.||Roush Fenway Racing||Ford|
|6||Clint Bowyer||Stewart-Haas Racing||Ford|
|7||Paul Menard||Wood Brothers Racing||Ford|
|8||Aric Almirola||Stewart-Haas Racing||Ford|
|9||Matt DiBenedetto||Leavine Family Racing||Toyota|
|10||Denny Hamlin||Joe Gibbs Racing||Toyota|
|11||Martin Truex Jr.||Joe Gibbs Racing||Toyota|
|12||Kurt Busch||Chip Ganassi Racing||Chevrolet|
|13||Darrell Wallace Jr.||Richard Petty Motorsports||Chevrolet|
|14||Ryan Blaney||Team Penske||Ford|
|15||Chris Buescher||JTG Daugherty Racing||Chevrolet|
|16||Jamie McMurray||Spire Motorsports||Chevrolet|
|17||Jimmie Johnson||Hendrick Motorsports||Chevrolet|
|18||Chase Elliott||Hendrick Motorsports||Chevrolet|
|19||Ryan Newman||Roush Fenway Racing||Ford|
|20||Austin Dillon||Richard Childress Racing||Chevrolet|
|21||Ryan Preece||JTG Daugherty Racing||Chevrolet|
|22||Ty Dillon||Germain Racing||Chevrolet|
|23||Daniel Suarez||Stewart-Haas Racing||Ford|
|24||David Ragan||Front Row Motorsports||Ford|
|25||Parker Kligerman||Gaunt Brothers Racing||Toyota|
|26||Kyle Larson||Chip Ganassi Racing||Chevrolet|
|27||Landon Cassill||StarCom Racing||Chevrolet|
|28||Erik Jones||Joe Gibbs Racing||Toyota|
|29||Daniel Hemric||Richard Childress Racing||Chevrolet|
|30||Brendan Gaughan||Beard Motorsports||Chevrolet|
|31||Kyle Busch||Joe Gibbs Racing||Toyota|
|32||Corey LaJoie||Go FAS Racing||Ford|
|33||Matt Tifft||Front Row Motorsports||Ford|
|34||Michael McDowell||Front Row Motorsports||Ford|
|35||Brad Keselowski||Team Penske||Ford|
|36||Ross Chastain||Premium Motorsports||Chevrolet|
|37||Cody Ware||Rick Ware Racing||Chevrolet|
|38||B.J. McLeod||Petty Ware Racing||Chevrolet|
|39||Tyler Reddick||Richard Childress Racing||Chevrolet|
|40||Casey Mears||Germain Racing||Chevrolet|