4. Indian Wells Tennis Stadium, California
The Indian Wells Masters is widely considered to be the fifth most important tennis tournament conducted in the year.
This stadium has about 16,102, seats making it one of the largest in the world. It was built in the year 2000 and has got several user-friendly features for the players as well as the fans.
Serbian legend Novak Djokovic has won the championship 6 times on this court. The stadium has conducted several concerts too.
3. O2 Arena, London
The O2 Arena in London is named after the telecommunication company O2. This has a massive capacity of 17,500 and is one of the largest multi-purpose arenas in the world.
The O2 has been conducting the ATP World Tour Finals since 2009, and will continue to do so until at least 2020. This is an indoor stadium and has been constructed in such a manner that the echoing inside the arena is kept to a minimum.