A Chelsea supporter posted anti-Semitic tweets aimed at Tottenham fans, including photos of Auschwitz and a man doing a Nazi salute, a court has heard.
Nathan Blagg, 21, pleaded guilty to seven counts of sending offensive messages when he appeared at Westminster Magistrates' Court.
The prosecutor said there had been a "racially aggravated" element to the offences because of the "anti-Semitic nature of many of them".
Blagg will be sentenced on 5 November.
The lifelong Chelsea supporter, from Retford, Nottinghamshire, sent the tweets between September 2020 and February this year, the court was told.