Arsenal are on the verge of an injury crisis, as it has now emerged that Gabriel Jesus is suffering from a knee issue. Arsenal are set to face Liverpool in the FA Cup today, but they may be without the Brazilian as he is now a major doubt for the game. Jesus is a key figure for Arsenal, but missed significant chunks of last season with a knee injury, and has also been absent at times this season with knee and hamstring issues. The 26-year-old has not been at his best in front of goal, which has led to calls for Mikel Arteta to sign a striker, but he would still be a huge miss for the work-rate…