Journalist James McNicholas has been seriously impressed by how one Arsenal star has moved on from one difficult incident in his career. Bukayo Saka is now a reliable penalty taker for Arsenal. The winger was once again faultless from the spot as he confidently dispatched his penalty in the shootout win over Porto on Tuesday evening. Saka was the third Arsenal player to step up in the shootout and thumped the ball past Diogo Costa. Arsenal fans felt that Saka was generally poor in this second-leg clash. However, when the pressure was really on and he was needed to step up, he made no mistake. …