Arsenal boss Mikel Arteta (Picture: Getty)Arsenal have received an approach for Gabriel Martinelli after completing a £75m deal for Bruno Guimaraes. Arsenal have also strengthened Arteta’s options on the wing, signing Christos Tzolis in a £34m deal from Club Brugge. Gabriel Martinelli could end his long spell with Arsenal (Picture: Getty)The Brazilian has been a mainstay in the team since then, making 278 appearances for Arsenal in all competitions. There remains a possibility that Arsenal will sell Martinelli and they have received a tempting transfer approach from Galatasaray, according to Football London. Arrow MORE: Liverpool hero claims new Arsenal signing isn’t ‘top class’Arrow MORE: Man Utd in talks to beat Arsenal to signing of ‘fearless’ midfielderArrow MORE: Andrey Santos makes Chelsea claim after £48m Manchester United transfer