Alisa Vainio, Finland's European champion, races in Berlin for the eighth time in a year. She aims to improve her personal best and break 2:20. Vainio's marathon streak began last September at the World Championships in Tokyo.

Vainio's remarkable run includes breaking the Finnish and Nordic records. She won the European Championships in Birmingham, dominating the race. Vainio's next race is scheduled for Valencia in December. Read more racing coverage.

Berlin's marathon features strong competitors, including Tigist Assefa, who targets the 2:10 barrier. The men's race lacks its top names, Sawe and Bekele, due to injuries. Tanzania's Gabriel Geay leads the men's field. Related: Berlin Marathon: Tigst Assefa Aims for World Record.

This original Runner World brief is based on reporting from Athletics Weekly. Visit the source for its complete reporting, context and any later corrections.