The powerhouses of the Premier League were all busy in the last few days of the transfer window.
Arsenal shocked world football with the acquisition of Mesut Ozil for £42.4m from Real Madrid.
Manchester United predictably signed Marouane Fellaini from Everton as David Moyes signed the Belgian for the second time after originally bringing him to Goodison Park.
Both of those players are expected to make their debuts this weekend along with Chelsea's new signings Samuel Eto'o and Willian as well as Christian Eriksen for Tottenham.
But debuts don't always go as planned. So we look how their opening match could go wrong.