Why have Gunners brought in Konsa?

[Getty Images]Arsenal have spent more than £100m already, bringing in midfielder Bruno Guimaraes from Newcastle (£75m) and Club Brugge winger Christos Tzolis (£34m) during this transfer window.Last season, their extremely well-organised defence - aided by the effective partnership of William Saliba and Gabriel - helped them win their first title in 22 years as they conceded just 27 league goals.But half of their title-winning backline is not going to be fit for the first part o