Second-tier Schalke's 1-0 extra-time win at fourth division Lokomotive Leipzig was suspended briefly after Schalke's Christopher Antwi-Adjei had a confrontation with fans.
Leipzig said racist abuse could not be confirmed by anyone else, but the player was adamant afterwards.
"It's not acceptable, not in this day and age, not at all," said Antwi-Adjei, who reported the incident to the assistant referee.
"Quite simply, it was racism. I think it has no place on a football field or generally in society. I don't want to repeat the words that were used, but it's disappointing.
"I'm not the type to go home and cry, but still it's disappointing that it happens on the field these days."
After the short suspension, Antwi-Adjei was booed every time he touched the ball by Leipzig fans.
The German-born Ghana international said: "There are always a few people here in the stadium who think they can get away with anything. They think they know better."
Schalke captain Kenan Karaman said. "It overshadows the whole game. I signalled straight away to the referee that we wouldn't continue if it didn't stop, and luckily the referee reacted.
"Then the announcement came in the stadium that this kind of thing isn't tolerated and that it has no place in sport. I'm glad that Christopher handled it well and still played a good game."
Meanwhile a Kaiserslautern substitute warming up on the sidelines during the second half of the tie at Eintracht Stanhsdorf appeared to receive an insult from the crowd.
The alleged perpetrator was identified following the quick intervention of spectators and security at the Karl Liebknecht Stadium in Potsdam. The match, which second-tier Kaiserslautern won 7-0, continued without interruption.
Kaiserslautern coach Torsten Lieberknecht, who praised the intervention of the Stahnsdorf fans, said: ""There's always some idiot around. It's not representative of what Stahnsdorf stand for, and how we were welcomed here."
Lieberknecht did not name the player involved and Stahnsdorf spokesman Kay Seifarth said the lower league club would investigate the case thoroughly.