Why Viktor Gyokeres is struggling at Arsenal: The mistakes Swede keeps making, how a clash of styles is hurting 'confidence player', the missing ingredient from his time at Sporting Lisbon and Mikel Arteta's verdict on hit-and-miss striker

Why Viktor Gyokeres is struggling at Arsenal: The mistakes Swede keeps making, how a clash of styles is hurting ‘confidence player’, the missing ingredient from his time at Sporting Lisbon and Mikel Arteta’s verdict on hit-and-miss striker