To mount a serious Premier League title challenge, a side must have a reliable pair of hands at the back. For Arsenal this season, Polish 'keeper Wojciech Szczesny has looked far from the quality shot stopper of recent years, and has made six errors leading to opposition shots or goals.
At the higher end of the table, Chelsea's Courtois has justified Jose Mourinho's decision to drop seasoned goalie Cech, with the Belgian international yet to make a single mistake in the Blues' net.
As Man United snap up Victor Valdes as a reinforcement for David De Gea, should Arsene Wenger look to make a move in the transfer window for a new goalkeeper? With Champions League qualification a must for the North London club, perhaps the French boss should give David Ospina a chance in front of the Emirates crowd, or indeed, look to see who's available this January.