Now the transfer window has closed, it really is time to start getting down to the business of winning Premier League matches and, for a number of players, proving that you have what it takes to succeed in one of Europe's most demanding leagues.
Take Marouane Fellaini, for example, his £27.5million deadline day signing from Everton has been dismissed by many Manchester United fans as not what they need or not good enough. So, the big Belgian has a task on his hands to prove to his doubters he can produce for the Premier League champions.
Although, Fellaini probably doesn't have the most severe case of point-to-prove-itis, as he obviously provides some variety to the United midfield.
There are, however, a few players that have a pressing need to, for a variety of reasons, show their manager, teammates or fans that they are the real deal and any doubting them was a mistake.
GMS have picked out five of these individuals, in no particular order, that have work to do now that the window has closed - click on to see who they are...