Comments made by England players such as Tammy Abraham about walking off the pitch in the face of racist abuse have been described as "derogatory" by the president of the Bulgarian Football Union.
Borislav Mikhaylov, the former national team goalkeeper, has written to UEFA to express his frustration at the comments and called on European football's governing body to sanction England if they go against UEFA's three-step protocol on how to handle racist chanting.
Mikhaylov's letter to UEFA general secretary Theodore Theodoridis began: "It is with a great feeling of regret that I find myself obligated to address you regarding a matter that I assumed to have been peacefully resolved at the end of last month.
"I first raised awareness about the issue at hand following England manager Gareth Southgate's comments on potential racial abuse in England's visit to Sofia on October 14; comments that the Bulgarian Football Union, the Bulgarian general public and I personally find offensive due to unjust branding of the local spectators as people inclined to discriminatory behaviour.
"Following the communication with English FA president Mr. Greg Clarke I was informed that Mr. Southgate's concerns were mainly due to the fact that Bulgaria received a UEFA sanction for racist chants in 2011 - and even though I view these comments as disregarding of all the work that the BFU has done over these eight years, I truly believed that our federation's immediate reaction would result in a more constructive handling of public and media matters in the eve of the game in Sofia."
Mikhaylov said he was "shocked" by the remarks from the England camp and said the accusations were "not only unjust but are continuous attempts to disrupt the atmosphere before a very much anticipated game of football".
He continued: "I, as president of the Bulgarian Football Union, cannot allow for such derogatory claims to continue being spread in the mass media and I strongly suggest that the UEFA administration take measures against the build-up of unnecessary tension in the weeks devoted to equality and to the celebration of football."
Abraham said on Tuesday that the England team had held discussions about the possibility of walking off the pitch in the event of racist abuse in either of their next two qualifiers, against the Czech Republic on Friday and Bulgaria on Monday.
The Bulgarian federation was hit by a two-match partial stadium closure for racist abuse during home qualifiers against the Czechs and Kosovo.
The second of those games will be Monday's match against England.