Again controversy followed Holger Rune during his tie against Alejandro Davidovich-Fokina at the Madrid Open.
This saw Rune receive a stern word from the umpire, Carlos Bernardes about why the crowd were booing him at Caja Magica.
Now that moment has been seen with Rune stepping close to or on a questionable mark that Davidovich-Fokina asked the umpire to call a supervisor to check.
Watch the video below.