Summerstown is a district of south-west London located on the boundary between the London Borough of Wandsworth and the London Borough of Merton. It lies east of Wimbledon south of Earlsfield, west of Tooting and north of Collier's Wood. The district is bisected by the main A217 road and bordered by the River Wandle. The area is home to Wimbledon Stadium, a dog racing track that also hosts speedway, stock car and other racing events.