<P> The day upon which a window closes is known as transfer deadline day, and is usually one of the busiest days of the window, generating a flurry of transfers, often because a number of interdependent transfers are completed resembling a housing chain, generating much media interest . </P> <P> Steve Coppell, former manager of Reading in England's Premier League, and others have called for the transfer window to be scrapped in favour of the previous system, where deals could be struck throughout the season until the closing weeks . Coppell said that the transfer window breeds panic and encourages "scurrilous" transfer activity adding that "I cannot see the logic in a transfer window . It brings on a fire - sale mentality, causes unrest via the media and means clubs buy too many players" adding that "The old system, where if you had a problem you could look at loans or make a short - term purchase, was far better than this system we have at the moment". Former England Manager Sven - Göran Eriksson has also questioned the value of the transfer window, commenting: "You do wonder at times if it is right to have a window, it was easier when it was open all the time and perhaps fairer for the players . I am sure much of the business being done on the last day is a little bit desperate and that is not right . I think it was better before, but then I am old". </P> <P> In January 2013 Arsenal manager Arsène Wenger asked for the January transfer window to be limited to two transfers per window and claimed it is "unfair" in its current form . He cited Newcastle United transfer activity as an example . The following year, Wenger hit out at Manchester United's £ 37m purchase of Juan Mata from rivals Chelsea . Wenger argued that the transfer was unfair because United and Chelsea had already played each other twice during the season, but United would still have to play Arsenal, and said that "the rules should be adapted more for fairness". Manchester City manager Manuel Pellegrini backed the sentiment of Wenger, disagreeing that a player "can go from one team to another team in the same league at this part of the year" and also said that the winter transfer window was unbalanced in favour of big clubs, saying "a club with money can take the best players from the other teams". </P> <P> Former Crystal Palace manager Alan Pardew questioned why the Premier League transfer window remains open after the start of the season after Arsenal made a bid for midfielder Yohan Cabaye during his time as Newcastle United manager in August 2013 . </P>

When does the summer transfer window open for la liga