England manager Gareth Southgate called a team meeting on Monday to discuss what action the players would take if they were the target of repeated racist abuse in the future.
European governing body UEFA's three-step protocol for racism can lead to the referee abandoning a match if warnings to the crowd do not stop the fans racially abusing the players.
"(The meeting) was just about, if it does happen, which unfortunately it does sometimes, what we need to do and what the protocol is," Abraham's Chelsea team mate and new squad member Fikayo Tomori said.
He just briefed us about what was going to happen. We should be prepared for that because we know that sometimes you can go to countries and stuff like that can happen unfortunately.
"We are just there to play the game and whatever happens in the stands, we'll just let the authorities deal with that."
UEFA ordered the partial closure of Bulgaria's national stadium after racist behaviour by their fans in Euro 2020 qualifiers with the Czechs and Kosovo in June.
England top the group with 12 points and will qualify for next year's finals if they beat the second-placed Czechs.
Liverpool defender Trent Alexander-Arnold added: "If it does get extreme we may have to take a different action.
"It's a team decision, one that we all need to make. It doesn't matter if one player is abused or the team - we are one group.
Nobody should be made to feel uncomfortable on the pitch. Everyone should be given the chance to play in a fair environment. We are a team. If one person is abused then we all are, we are one big family."