If the ball travels low off the ground, it could skid along the court and leave a very long trail. If the end of this mark touches the line, is the ball good? — Mark Ailes, Lombard, Ill.

TENNIS.com: Lastly, slightly off-topic, but I’ve always wondered: when the ball impacts the court, is it accurate to say that not all ball marks are identical?

Zhang Shuai Walks Off Tennis Court in Tears After Opponent Rubs Away Disputed Ball Mark with Her Foot "Why'd you do that?" the Chinese tennis star asked opponent Amarissa Tóth, at the Hungarian ...

Some have even taken photos of the ball mark they believe proves their case. In Madrid, No. 1 seed Alexander Zverev used his phone to take a photo of a trace after a shot he believed to be out ...

Chinese tennis player Zhang Shuai retired from a match in tears after a tense incident with Amarissa Toth at the Hungarian Grand Prix saw Toth use her foot to erase a contested ball mark from the ...

During that changeover, Sabalenka used one of her team’s mobile phones to take a picture of the ball mark, which earned her a code violation from Bley — and according to Sabalenka, a ...

China's Zhang Shuai retired from her match against Amarissa Toth in the Hungarian Grand Prix Tuesday visibly shaken and in tears after her opponent appeared to erase a ball marker on a disputed call.

MADRID — Top-seeded Alexander Zverev got a warning from the umpire for taking a photo of a ball mark during the clay-court Madrid Open on Sunday after complaining about electronic line-calling.