BBC Sport explores how footballers and managers feel about professional autograph hunters, after a series of controversial incidents.
Atletico Madrid vs Arsenal: 5 things we learned from tense and testing Champions League draw in Madrid
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.jpeg?width=1200&auto=webp&crop=3%3A2&ssl=1 "Arsenal: Mikel Arteta disagrees with Martin Keown over Diego Simeone after Atletico draw")