Sonera Stadium (until August 2010 Finnair Stadium; also known as Töölön jalkapallostadion, "Töölö football stadium") is a football stadium in Helsinki, Finland.
The stadium was inaugurated in 2000. It has a capacity of 10,770 spectators. Originally the ground had a natural grass pitch, but it was soon replaced with an artificial one because the grass couldn't get enough sun light. Since then the stadium has seen numerous artificial playing surfaces that have been gradually replaced. The most recent artificial pitch was installed in April 2015.
The ground is located next to the Helsinki Olympic Stadium. Before the current stadium was constructed, it was known as the Helsinki Football Ground and hosted some of the football preliminaries for the 1952 Summer Olympics.
It is the home stadium of HJK, HIFK, and is also used for some friendlies by the Finnish national team. It hosted the final of the 2003 FIFA U-17 World Championship.
The stadium was named as one of the stadiums that host the 2009 UEFA Women's Championship. For that tournament, the artificial turf covering the field was temporarily replaced with grass.(Wikipedia)