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Arsenal’s teenage left-back Myles Lewis-Skelly needs to understand “the line is really thin” if he is to avoid disciplinary issues during his career, says manager Mikel Arteta.<\/b><\/p>\n
The 18-year-old has been booked twice and sent off twice since January. <\/p>\n
He was also substituted in the first half of Tuesday’s 7-1 Champions League win at PSV Eindhoven<\/a> after collecting a yellow card, and then going in hard and late on home defender Richard Ledezma shortly afterwards. <\/p>\n “A lesson to learn for him for sure. We will support and help him. The line is really thin in sport and he needs to understand that,” said Arteta.<\/p>\n “It wasn’t the moment to take any risk. He’s very intelligent, he’s extremely demanding of himself. He’s a perfectionist. He’s got a great environment around him – he’s here to learn as well.”<\/p>\n Lewis-Skelly, who made his senior debut during the 2-2 draw with Manchester City in September, has had an eventful start to his Arsenal career.<\/p>\n As well as scoring a brilliant individual goal in the 5-1 thrashing of City in the return fixture in January, he was controversially dismissed when Arsenal played Wolves at Molineux – a decision later overturned<\/a> after his team-mates battled to a 1-0 win.<\/p>\n He was again shown a red card in February as Arsenal’s title hopes were dented with a 1-0 home defeat by West Ham.<\/p>\n