Holywood - FIFA President Sepp Blatter says he's concerned by a study highlighting the scale of Russia's racism problem ahead of the 2018 World Cup.
The Fare network organization and the Moscow-based SOVA Center detailed dozens of cases of discriminatory behavior linked to Russian football over two seasons.
The report has been received by FIFA and Blatter told The Associated Press: "I am aware of the report ... sure we are concerned, definitely."
Last year, Blatter spoke to Russian President Vladimir Putin about making tackling racism a priority in 2018.
Blatter says "if it does not stop then there must be some sanctions."
Speaking on the sidelines of a meeting in Northern Ireland, Blatter added: "Racism is one of the items which is on my agenda on the very top, every day."