The president of the Bulgarian Football Union has expressed his “indignation and disappointment” at comments by Gareth Southgate about possible racism at next months Euro 2020 qualifier.
Borislav Mihaylov said the England managers comments were “groundless, inappropriate and unnecessary”.
But the BFS has written to Uefa and Southgates boss, Football Association chairman Greg Clarke, to express its unhappiness at his comments. Southgates words came in the wake of Raheem Sterling being the target of alleged abuse at Wembley last Saturday. It is understood that the 24-year-old was the focus of discriminatory language. A steward heard the individual in the Bulgaria section of the ground and they were ejected from Wembley and handed to the police, but no further action was taken.
Southgate said his team will “prepare” how to react to potential racism at the game in Sofia on 14 October.
In a letter to Uefa and the Football Association, former Bulgaria goalkeeper Mihaylov said: “We have not received any official information regarding discriminatory language used by a Bulgarian supporter at Wembley stadium.
“Even if this were the case however, we believe that generalisations and the creation of needless tension by official members of the English team is absolutely unacceptable and in contradiction with the spirit of mutual respect and fair play, the core values of both Uefa and the BFU.”
The FA said a fan in the away end at Wembley was ejected and arrested for “discriminatory abuse” during Englands 4-0 win over Bulgaria on Saturday.
The man was arrested on suspicion of an aggravated public order offence, but later released without charge.
Bulgarias Stadion Vasil Levski will be partially closed for their next two international matches following racist behaviour by their fans in Euro 2020 qualifying games against the Czech Republic and Kosovo in June.
Last month, Bulgarian club sides PFC Levski Sofia and PFC Lokomotiv Plovdiv were punished by Uefa for racism during Europa League games.
In a letter sent to European soccers governing body UEFA and the FA, former Bulgaria goalkeeper Mihaylov said: “We have not received any official information regarding discriminatory language used by a Bulgarian supporter at Wembley Stadium.
England have already encountered racist abuse during their Euro 2020 qualifying campaign, with Montenegro ordered to play their next home match behind closed doors following the racist abuse of England players by supporters in March.
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UEFA has ordered the BFU to partially close the Vasil Levski national stadium for Englands visit after supporters were found guilty of racist behaviour in matches earlier this year.