Arsenal are in a bit of a tricky situation ahead of their North London derby clash with Tottenham Hotspur this weekend. At 2pm on Sunday, the Gunners will lock horns with Spurs at N17 as both sides seek to get their respective Premier League seasons back on track. However, Arsenal will have to do so without a number of key players, while some others remain doubts going into the weekend. Mikel Merino and Declan Rice are definitely out, while Martin Odegaard, Gabriel Jesus and Riccardo Calafiori will face late fitness tests. Now, a player who could be a training replacement for Calafiori has bee…