Arsenal hit by Leandro Trossard injury blow ahead of crucial derby against Chelsea

Leandro Trossard is a doubt for Arsenal’s crunch London derby at Chelsea on Sunday after limping out of the Gunners’ Champions League win over Bayern Munich.Trossard walked off shortly before half-time with some discomfort in his left leg after receiving treatment from a member of Arsenal’s medical staff. He shared some words with manager Mikel Arteta before walking down the tunnel, and the manager later explained: “With Leo, we don’t know [the extent of his injury]