Hincapié and Zubimendi out after warm-down injuries but Arsenal get Saliba boost

<ul><li><p>Defender and midfielder hurt after win against Leeds</p></li><li><p>Saliba resumes training on his own after back injury</p></li></ul><p>Mikel Arteta has admitted frustration after Piero Hincapié and Martín Zubimendi sustai