Monaco's Aurelien Tchouameni says he has received death threats following the alleged racist abuse aimed at him by Sparta Prague fans on Tuesday.
The incident took place as the French side beat Sparta Prague 2-0 in the first leg of the Champions League third qualifying round in the Czech capital.
Tchouameni, 21, posted on Twitter that the "hateful messages" will not affect him personally.
"I won't let hate win this game," the midfielder said.
France Under-21 player Tchouameni scored the opener for the Ligue 1 side with a header in the 37th minute before German striker Kevin Volland doubled their advantage in the second half.
Following Tchouameni's goal, he and his team-mates ran over to Monaco manager Niko Kovac and Uefa officials - including English referee Michael Oliver - to complain about alleged racist chanting from the crowd directed towards him.
The match was held up for three minutes as Uefa protocols were followed by Oliver.
A message played on the public address system and posted on the Letna Stadium screen warned that further racist abuse would lead to the game being stopped.
Tchouameni questioned the procedures Uefa have in place to deal with racist behaviour, asking why players who are racially abused are not involved in deciding the protocols.
He also queried why a game could be stopped to check if a player was offside "by an inch" but the same could not be done for racist chanting from the stands.
"Yesterday, our club cam was on the pitch and caught it all," he added. "It was loud and clear."
Kovac said after the game Monaco were "very sad and disgusted" that abuse of this nature still continues "in the 21st century".
The return leg in Monaco takes place next Tuesday.
In April this year, Ondrej Kudela, who plays for another Czech club Slavia Prague, was banned for 10 matches after racially abusing Rangers' Glen Kamara.
The Finland midfielder was suspended for three games after being found guilty of assaulting Kudela in the tunnel after the sides' Europa League meeting at Ibrox in March, which Slavia won.