French Open organisers are investigating how a metal panel fell on to the crowd from the upper part of Court Philippe Chatrier.
Organisers first said three fans had been injured but Ysern told a news conference only one was hurt, suffering a wrist injury that required further checks at a hospital.
The incident occurred during the quarter-final between Frenchman Jo-Wilfried Tsonga and Japanese fifth seed Kei Nishikori.
"It's a plate of aluminium that was a three-metre long plate that fell on the spectators. These are plates that were above the scoreboard to protect these scoreboards fromRead More »from VIDEO: Roland Garros organisers probe alarming metal panel incident