Per Mertesacker unsure if he is fit enough for FA Cup final amid Arsenal defence crisis

Should Mertesacker start he would have to adjust to Arsenal's new 3-4-3 formation on only his second appearance of the season.

Arsenal's Per Mertesacker has revealed he has no idea if he is fit enough to play in Saturday's FA Cup final against Chelsea but has had to prepare himself to do so.

The club captain, 32, is in contention to start with Laurent Koscielny suspended, Gabriel Paulista injured and Shkodran Mustafi battling to overcome illness.