Manchester United's new stadium could become one of the largest stadiums in the world in terms of capacity once completed.
So, it is as good a time as any to take a look at the five biggest football club stadia right now.
Camp Nou, Barcelona
A general view of Camp Not stadiumGetty Images
Camp Nou, Barcelona's home since 1957, has a capacity of 99,354 which would rise to 105,000 once the ongoing renovation is completed.
FNB Stadium, Johannesburg
A general view of the Soccer City stadium ahead of the opening match in JohannesburgGetty Images
Also known as the Soccer City Stadium or the Calabash, the 94,736-seater venue in Johannesburg was opened in 1989 and was one of the venues for the 2010 World Cup that South Africa hosted and is also the home of Kaizer Chiefs.
Estadio Azteca, Mexico City
Aerial view of the remodelling works at the Azteca stadium in Mexico CityGetty Images
Sitting at an altitude of 7,200 feet above sea level, Estadio Azteca, opened in 1966, is the home ground of Club America and has a capacity of 87,523. The stadium is one of the venues for next year's World Cup.
Estadio Mas Monumental, Buenos Aires
Fans of River Plate before the match between River Plate and Atletico Tucuman at Estadio Mas MonumentalGetty Images
Opened in 1938, Estadio Mas Monumental is the home of River Plate and the venue located in the Argentine capital ofBuenos Aires has a capacity of 84,567 fans.
Signal Iduna Park, Dortmund
General view outside the Signal Iduna Park.Getty Images
Borussia Dortmund's home ground can seat 81,365 fans and was opened in 1974.