CHARLOTTE, N.C. — The landmark federal antitrust trial against NASCAR opened Monday with three-time Daytona 500 winner Denny Hamlin breaking down in tears minutes into his testimony as the first witness in a case that could upend the venerable stock car series.

Hamlin's 23XI Racing, which he co-owns with Michael Jordan, and Front Row Motorsports claim the series is a monopolistic bully that leaves its teams no option but to comply with rules and financing they don't agree with.

As Jordan watched from the gallery, Hamlin began to cry and had to stop and compose himself when asked how he got into racing. He disclosed to The Associated Press last month that his father is dying, and he said on the stand he was emotional because his dad “is not in great health.”

“We got to when I was about 2

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